./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/queue_longer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/queue_longer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/bin/uautomizer-uyxdKDjOR8 --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 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 11:39:08,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:39:08,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:39:08,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:39:08,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:39:08,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:39:08,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:39:08,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:39:08,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:39:08,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:39:08,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:39:08,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:39:08,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:39:08,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:39:08,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:39:08,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:39:08,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:39:08,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:39:08,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:39:08,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:39:08,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:39:08,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:39:08,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:39:08,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:39:08,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:39:08,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:39:08,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:39:08,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:39:08,461 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:39:08,462 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:39:08,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:39:08,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:39:08,464 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:39:08,464 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:39:08,465 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:39:08,466 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:39:08,466 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:39:08,466 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:39:08,467 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:39:08,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:39:08,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:39:08,469 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 11:39:08,489 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:39:08,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:39:08,490 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:39:08,490 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:39:08,491 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:39:08,491 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:39:08,491 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:39:08,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:39:08,492 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:39:08,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:39:08,492 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:39:08,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:39:08,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:39:08,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:39:08,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 11:39:08,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:39:08,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 11:39:08,494 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:39:08,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 11:39:08,494 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:39:08,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 11:39:08,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:39:08,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:39:08,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:39:08,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:39:08,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:39:08,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:39:08,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 11:39:08,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:39:08,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:39:08,496 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:39:08,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 11:39:08,496 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:39:08,497 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:39:08,497 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:39:08,497 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 [2022-12-13 11:39:08,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:39:08,694 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:39:08,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:39:08,696 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:39:08,696 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:39:08,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/queue_longer.i [2022-12-13 11:39:11,267 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:39:11,494 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:39:11,494 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/sv-benchmarks/c/pthread/queue_longer.i [2022-12-13 11:39:11,504 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/bin/uautomizer-uyxdKDjOR8/data/fa02f18c9/a36a1692ebe54071b586849c277308e3/FLAG8d40c449f [2022-12-13 11:39:11,863 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/bin/uautomizer-uyxdKDjOR8/data/fa02f18c9/a36a1692ebe54071b586849c277308e3 [2022-12-13 11:39:11,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:39:11,871 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:39:11,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:39:11,874 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:39:11,878 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:39:11,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:39:11" (1/1) ... [2022-12-13 11:39:11,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13e50699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:11, skipping insertion in model container [2022-12-13 11:39:11,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:39:11" (1/1) ... [2022-12-13 11:39:11,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:39:11,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:39:12,245 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/sv-benchmarks/c/pthread/queue_longer.i[43296,43309] [2022-12-13 11:39:12,250 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/sv-benchmarks/c/pthread/queue_longer.i[43503,43516] [2022-12-13 11:39:12,252 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/sv-benchmarks/c/pthread/queue_longer.i[43783,43796] [2022-12-13 11:39:12,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:39:12,263 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:39:12,293 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/sv-benchmarks/c/pthread/queue_longer.i[43296,43309] [2022-12-13 11:39:12,294 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/sv-benchmarks/c/pthread/queue_longer.i[43503,43516] [2022-12-13 11:39:12,297 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/sv-benchmarks/c/pthread/queue_longer.i[43783,43796] [2022-12-13 11:39:12,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:39:12,330 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:39:12,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:12 WrapperNode [2022-12-13 11:39:12,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:39:12,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:39:12,331 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:39:12,331 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:39:12,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:12" (1/1) ... [2022-12-13 11:39:12,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:12" (1/1) ... [2022-12-13 11:39:12,376 INFO L138 Inliner]: procedures = 274, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 241 [2022-12-13 11:39:12,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:39:12,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:39:12,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:39:12,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:39:12,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:12" (1/1) ... [2022-12-13 11:39:12,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:12" (1/1) ... [2022-12-13 11:39:12,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:12" (1/1) ... [2022-12-13 11:39:12,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:12" (1/1) ... [2022-12-13 11:39:12,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:12" (1/1) ... [2022-12-13 11:39:12,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:12" (1/1) ... [2022-12-13 11:39:12,405 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:12" (1/1) ... [2022-12-13 11:39:12,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:12" (1/1) ... [2022-12-13 11:39:12,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:39:12,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:39:12,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:39:12,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:39:12,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:12" (1/1) ... [2022-12-13 11:39:12,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:39:12,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:39:12,433 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:39:12,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366a4c65-2e48-4cde-ba3c-3771642ce19d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:39:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 11:39:12,465 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 11:39:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 11:39:12,466 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 11:39:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:39:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:39:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 11:39:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 11:39:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 11:39:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:39:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:39:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:39:12,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:39:12,468 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 11:39:12,564 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:39:12,566 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:39:12,846 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:39:12,857 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:39:12,857 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 11:39:12,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:39:12 BoogieIcfgContainer [2022-12-13 11:39:12,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:39:12,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:39:12,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:39:12,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:39:12,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:39:11" (1/3) ... [2022-12-13 11:39:12,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ee52f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:39:12, skipping insertion in model container [2022-12-13 11:39:12,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:12" (2/3) ... [2022-12-13 11:39:12,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ee52f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:39:12, skipping insertion in model container [2022-12-13 11:39:12,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:39:12" (3/3) ... [2022-12-13 11:39:12,866 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longer.i [2022-12-13 11:39:12,874 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 11:39:12,882 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:39:12,882 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-12-13 11:39:12,882 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:39:12,948 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 11:39:12,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 272 transitions, 560 flow [2022-12-13 11:39:13,063 INFO L130 PetriNetUnfolder]: 15/270 cut-off events. [2022-12-13 11:39:13,063 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 11:39:13,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 270 events. 15/270 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 362 event pairs, 0 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 196. Up to 2 conditions per place. [2022-12-13 11:39:13,071 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 272 transitions, 560 flow [2022-12-13 11:39:13,075 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 252 places, 260 transitions, 529 flow [2022-12-13 11:39:13,078 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:39:13,086 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 252 places, 260 transitions, 529 flow [2022-12-13 11:39:13,089 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 252 places, 260 transitions, 529 flow [2022-12-13 11:39:13,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 260 transitions, 529 flow [2022-12-13 11:39:13,131 INFO L130 PetriNetUnfolder]: 15/260 cut-off events. [2022-12-13 11:39:13,132 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:39:13,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 260 events. 15/260 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 326 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 196. Up to 2 conditions per place. [2022-12-13 11:39:13,140 INFO L119 LiptonReduction]: Number of co-enabled transitions 16892 [2022-12-13 11:39:19,600 INFO L134 LiptonReduction]: Checked pairs total: 36623 [2022-12-13 11:39:19,600 INFO L136 LiptonReduction]: Total number of compositions: 227 [2022-12-13 11:39:19,612 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:39:19,617 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;@6c55eb3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:39:19,617 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 11:39:19,618 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 11:39:19,618 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:39:19,618 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:19,619 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 11:39:19,619 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:39:19,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:19,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1049, now seen corresponding path program 1 times [2022-12-13 11:39:19,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:19,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519422724] [2022-12-13 11:39:19,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:19,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:19,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:19,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519422724] [2022-12-13 11:39:19,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519422724] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:19,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:19,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 11:39:19,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942172424] [2022-12-13 11:39:19,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:19,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 11:39:19,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:19,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 11:39:19,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 11:39:19,750 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 499 [2022-12-13 11:39:19,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 141 flow. Second operand has 2 states, 2 states have (on average 259.5) internal successors, (519), 2 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:19,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:19,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 499 [2022-12-13 11:39:19,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:20,086 INFO L130 PetriNetUnfolder]: 1665/2832 cut-off events. [2022-12-13 11:39:20,086 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-12-13 11:39:20,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5499 conditions, 2832 events. 1665/2832 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 13335 event pairs, 1323 based on Foata normal form. 90/2478 useless extension candidates. Maximal degree in co-relation 5328. Up to 2593 conditions per place. [2022-12-13 11:39:20,095 INFO L137 encePairwiseOnDemand]: 496/499 looper letters, 54 selfloop transitions, 0 changer transitions 0/63 dead transitions. [2022-12-13 11:39:20,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 63 transitions, 243 flow [2022-12-13 11:39:20,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 11:39:20,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 11:39:20,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 575 transitions. [2022-12-13 11:39:20,106 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5761523046092184 [2022-12-13 11:39:20,107 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 575 transitions. [2022-12-13 11:39:20,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 575 transitions. [2022-12-13 11:39:20,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:20,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 575 transitions. [2022-12-13 11:39:20,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 287.5) internal successors, (575), 2 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:20,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 499.0) internal successors, (1497), 3 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:20,120 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 499.0) internal successors, (1497), 3 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:20,122 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 141 flow. Second operand 2 states and 575 transitions. [2022-12-13 11:39:20,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 63 transitions, 243 flow [2022-12-13 11:39:20,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 63 transitions, 238 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 11:39:20,126 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 130 flow [2022-12-13 11:39:20,127 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=130, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2022-12-13 11:39:20,130 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -3 predicate places. [2022-12-13 11:39:20,130 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 130 flow [2022-12-13 11:39:20,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 259.5) internal successors, (519), 2 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:20,130 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:20,131 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:20,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 11:39:20,131 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:39:20,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:20,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1283828037, now seen corresponding path program 1 times [2022-12-13 11:39:20,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:20,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748741715] [2022-12-13 11:39:20,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:20,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:20,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:20,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748741715] [2022-12-13 11:39:20,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748741715] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:20,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:20,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:39:20,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302634506] [2022-12-13 11:39:20,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:20,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:39:20,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:20,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:39:20,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:39:20,320 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 499 [2022-12-13 11:39:20,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:20,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:20,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 499 [2022-12-13 11:39:20,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:20,607 INFO L130 PetriNetUnfolder]: 1629/2796 cut-off events. [2022-12-13 11:39:20,607 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 11:39:20,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5408 conditions, 2796 events. 1629/2796 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 13348 event pairs, 1272 based on Foata normal form. 0/2388 useless extension candidates. Maximal degree in co-relation 5405. Up to 2428 conditions per place. [2022-12-13 11:39:20,616 INFO L137 encePairwiseOnDemand]: 495/499 looper letters, 71 selfloop transitions, 3 changer transitions 0/83 dead transitions. [2022-12-13 11:39:20,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 83 transitions, 320 flow [2022-12-13 11:39:20,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:39:20,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:39:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 837 transitions. [2022-12-13 11:39:20,619 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5591182364729459 [2022-12-13 11:39:20,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 837 transitions. [2022-12-13 11:39:20,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 837 transitions. [2022-12-13 11:39:20,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:20,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 837 transitions. [2022-12-13 11:39:20,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:20,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:20,623 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:20,624 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 130 flow. Second operand 3 states and 837 transitions. [2022-12-13 11:39:20,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 83 transitions, 320 flow [2022-12-13 11:39:20,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 83 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 11:39:20,625 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 134 flow [2022-12-13 11:39:20,625 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2022-12-13 11:39:20,626 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -1 predicate places. [2022-12-13 11:39:20,626 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 134 flow [2022-12-13 11:39:20,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:20,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:20,626 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:20,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 11:39:20,626 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:39:20,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:20,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1102047211, now seen corresponding path program 1 times [2022-12-13 11:39:20,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:20,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562234820] [2022-12-13 11:39:20,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:20,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:21,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:21,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562234820] [2022-12-13 11:39:21,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562234820] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:21,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:21,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 11:39:21,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875066240] [2022-12-13 11:39:21,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:21,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:39:21,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:21,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:39:21,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:39:21,414 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 499 [2022-12-13 11:39:21,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:21,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:21,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 499 [2022-12-13 11:39:21,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:21,796 INFO L130 PetriNetUnfolder]: 1741/2947 cut-off events. [2022-12-13 11:39:21,796 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2022-12-13 11:39:21,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5854 conditions, 2947 events. 1741/2947 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 13756 event pairs, 1296 based on Foata normal form. 0/2527 useless extension candidates. Maximal degree in co-relation 5850. Up to 2731 conditions per place. [2022-12-13 11:39:21,805 INFO L137 encePairwiseOnDemand]: 491/499 looper letters, 57 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2022-12-13 11:39:21,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 298 flow [2022-12-13 11:39:21,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:39:21,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 11:39:21,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1714 transitions. [2022-12-13 11:39:21,808 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49069567706842254 [2022-12-13 11:39:21,808 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1714 transitions. [2022-12-13 11:39:21,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1714 transitions. [2022-12-13 11:39:21,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:21,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1714 transitions. [2022-12-13 11:39:21,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 244.85714285714286) internal successors, (1714), 7 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:21,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 499.0) internal successors, (3992), 8 states have internal predecessors, (3992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:21,816 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 499.0) internal successors, (3992), 8 states have internal predecessors, (3992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:21,816 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 134 flow. Second operand 7 states and 1714 transitions. [2022-12-13 11:39:21,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 298 flow [2022-12-13 11:39:21,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 75 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:39:21,819 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 199 flow [2022-12-13 11:39:21,819 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=199, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2022-12-13 11:39:21,819 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 8 predicate places. [2022-12-13 11:39:21,819 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 199 flow [2022-12-13 11:39:21,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:21,820 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:21,820 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:21,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 11:39:21,820 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)] === [2022-12-13 11:39:21,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:21,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1794055742, now seen corresponding path program 1 times [2022-12-13 11:39:21,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:21,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906706006] [2022-12-13 11:39:21,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:21,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:22,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:22,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906706006] [2022-12-13 11:39:22,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906706006] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:22,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:22,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 11:39:22,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002379762] [2022-12-13 11:39:22,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:22,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:39:22,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:22,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:39:22,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:39:23,080 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 499 [2022-12-13 11:39:23,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 199 flow. Second operand has 10 states, 10 states have (on average 220.3) internal successors, (2203), 10 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:23,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:23,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 499 [2022-12-13 11:39:23,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:23,893 INFO L130 PetriNetUnfolder]: 2556/4321 cut-off events. [2022-12-13 11:39:23,894 INFO L131 PetriNetUnfolder]: For 250/250 co-relation queries the response was YES. [2022-12-13 11:39:23,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8792 conditions, 4321 events. 2556/4321 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 22652 event pairs, 165 based on Foata normal form. 0/3795 useless extension candidates. Maximal degree in co-relation 8783. Up to 2650 conditions per place. [2022-12-13 11:39:23,913 INFO L137 encePairwiseOnDemand]: 488/499 looper letters, 157 selfloop transitions, 21 changer transitions 2/187 dead transitions. [2022-12-13 11:39:23,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 187 transitions, 819 flow [2022-12-13 11:39:23,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:39:23,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:39:23,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2146 transitions. [2022-12-13 11:39:23,917 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4778445780449789 [2022-12-13 11:39:23,917 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2146 transitions. [2022-12-13 11:39:23,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2146 transitions. [2022-12-13 11:39:23,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:23,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2146 transitions. [2022-12-13 11:39:23,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 238.44444444444446) internal successors, (2146), 9 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:23,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:23,927 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:23,927 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 199 flow. Second operand 9 states and 2146 transitions. [2022-12-13 11:39:23,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 187 transitions, 819 flow [2022-12-13 11:39:23,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 187 transitions, 819 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 11:39:23,930 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 333 flow [2022-12-13 11:39:23,930 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=333, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2022-12-13 11:39:23,930 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 23 predicate places. [2022-12-13 11:39:23,930 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 333 flow [2022-12-13 11:39:23,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 220.3) internal successors, (2203), 10 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:23,931 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:23,931 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:23,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 11:39:23,931 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:39:23,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:23,932 INFO L85 PathProgramCache]: Analyzing trace with hash -636399338, now seen corresponding path program 1 times [2022-12-13 11:39:23,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:23,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8631182] [2022-12-13 11:39:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:23,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:23,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:23,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8631182] [2022-12-13 11:39:23,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8631182] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:23,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:23,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:39:23,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540154472] [2022-12-13 11:39:23,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:23,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:39:23,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:23,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:39:23,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:39:23,980 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 499 [2022-12-13 11:39:23,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 333 flow. Second operand has 3 states, 3 states have (on average 258.6666666666667) internal successors, (776), 3 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:23,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:23,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 499 [2022-12-13 11:39:23,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:24,267 INFO L130 PetriNetUnfolder]: 1501/2581 cut-off events. [2022-12-13 11:39:24,267 INFO L131 PetriNetUnfolder]: For 241/246 co-relation queries the response was YES. [2022-12-13 11:39:24,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5469 conditions, 2581 events. 1501/2581 cut-off events. For 241/246 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 10815 event pairs, 781 based on Foata normal form. 95/2282 useless extension candidates. Maximal degree in co-relation 5452. Up to 1340 conditions per place. [2022-12-13 11:39:24,277 INFO L137 encePairwiseOnDemand]: 495/499 looper letters, 84 selfloop transitions, 3 changer transitions 2/100 dead transitions. [2022-12-13 11:39:24,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 100 transitions, 501 flow [2022-12-13 11:39:24,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:39:24,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:39:24,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 841 transitions. [2022-12-13 11:39:24,279 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5617902471609887 [2022-12-13 11:39:24,279 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 841 transitions. [2022-12-13 11:39:24,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 841 transitions. [2022-12-13 11:39:24,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:24,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 841 transitions. [2022-12-13 11:39:24,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:24,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:24,283 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:24,283 INFO L175 Difference]: Start difference. First operand has 86 places, 88 transitions, 333 flow. Second operand 3 states and 841 transitions. [2022-12-13 11:39:24,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 100 transitions, 501 flow [2022-12-13 11:39:24,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 100 transitions, 467 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-12-13 11:39:24,286 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 249 flow [2022-12-13 11:39:24,286 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2022-12-13 11:39:24,287 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 17 predicate places. [2022-12-13 11:39:24,287 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 249 flow [2022-12-13 11:39:24,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.6666666666667) internal successors, (776), 3 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:24,287 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:24,287 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:24,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 11:39:24,288 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:39:24,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:24,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1368649129, now seen corresponding path program 1 times [2022-12-13 11:39:24,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:24,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332027357] [2022-12-13 11:39:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:24,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:24,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:24,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332027357] [2022-12-13 11:39:24,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332027357] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:24,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:24,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 11:39:24,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557836265] [2022-12-13 11:39:24,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:24,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:39:24,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:24,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:39:24,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:39:25,444 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 499 [2022-12-13 11:39:25,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 249 flow. Second operand has 10 states, 10 states have (on average 221.3) internal successors, (2213), 10 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:25,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:25,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 499 [2022-12-13 11:39:25,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:26,067 INFO L130 PetriNetUnfolder]: 1516/2625 cut-off events. [2022-12-13 11:39:26,067 INFO L131 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2022-12-13 11:39:26,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5578 conditions, 2625 events. 1516/2625 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 11050 event pairs, 1142 based on Foata normal form. 0/2262 useless extension candidates. Maximal degree in co-relation 5564. Up to 2418 conditions per place. [2022-12-13 11:39:26,076 INFO L137 encePairwiseOnDemand]: 488/499 looper letters, 67 selfloop transitions, 17 changer transitions 1/93 dead transitions. [2022-12-13 11:39:26,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 93 transitions, 466 flow [2022-12-13 11:39:26,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:39:26,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:39:26,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2061 transitions. [2022-12-13 11:39:26,084 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4589178356713427 [2022-12-13 11:39:26,084 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2061 transitions. [2022-12-13 11:39:26,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2061 transitions. [2022-12-13 11:39:26,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:26,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2061 transitions. [2022-12-13 11:39:26,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 229.0) internal successors, (2061), 9 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:26,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:26,093 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:26,093 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 249 flow. Second operand 9 states and 2061 transitions. [2022-12-13 11:39:26,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 93 transitions, 466 flow [2022-12-13 11:39:26,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 93 transitions, 463 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:39:26,096 INFO L231 Difference]: Finished difference. Result has 89 places, 83 transitions, 330 flow [2022-12-13 11:39:26,097 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=330, PETRI_PLACES=89, PETRI_TRANSITIONS=83} [2022-12-13 11:39:26,097 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 26 predicate places. [2022-12-13 11:39:26,097 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 83 transitions, 330 flow [2022-12-13 11:39:26,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 221.3) internal successors, (2213), 10 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:26,098 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:26,098 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:26,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 11:39:26,098 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:39:26,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:26,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1374792736, now seen corresponding path program 1 times [2022-12-13 11:39:26,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:26,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458311220] [2022-12-13 11:39:26,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:26,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:26,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:26,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458311220] [2022-12-13 11:39:26,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458311220] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:26,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:26,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 11:39:26,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091822985] [2022-12-13 11:39:26,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:26,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 11:39:26,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:26,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 11:39:26,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-13 11:39:27,315 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 499 [2022-12-13 11:39:27,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 83 transitions, 330 flow. Second operand has 11 states, 11 states have (on average 216.27272727272728) internal successors, (2379), 11 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:27,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:27,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 499 [2022-12-13 11:39:27,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:27,851 INFO L130 PetriNetUnfolder]: 1492/2609 cut-off events. [2022-12-13 11:39:27,851 INFO L131 PetriNetUnfolder]: For 288/288 co-relation queries the response was YES. [2022-12-13 11:39:27,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5610 conditions, 2609 events. 1492/2609 cut-off events. For 288/288 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 11231 event pairs, 430 based on Foata normal form. 9/2260 useless extension candidates. Maximal degree in co-relation 5593. Up to 1967 conditions per place. [2022-12-13 11:39:27,858 INFO L137 encePairwiseOnDemand]: 487/499 looper letters, 96 selfloop transitions, 19 changer transitions 10/133 dead transitions. [2022-12-13 11:39:27,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 133 transitions, 691 flow [2022-12-13 11:39:27,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:39:27,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:39:27,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2051 transitions. [2022-12-13 11:39:27,861 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4566911600979737 [2022-12-13 11:39:27,861 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2051 transitions. [2022-12-13 11:39:27,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2051 transitions. [2022-12-13 11:39:27,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:27,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2051 transitions. [2022-12-13 11:39:27,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 227.88888888888889) internal successors, (2051), 9 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:27,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:27,867 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:27,867 INFO L175 Difference]: Start difference. First operand has 89 places, 83 transitions, 330 flow. Second operand 9 states and 2051 transitions. [2022-12-13 11:39:27,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 133 transitions, 691 flow [2022-12-13 11:39:27,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 133 transitions, 649 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-12-13 11:39:27,870 INFO L231 Difference]: Finished difference. Result has 89 places, 81 transitions, 340 flow [2022-12-13 11:39:27,870 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=340, PETRI_PLACES=89, PETRI_TRANSITIONS=81} [2022-12-13 11:39:27,871 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 26 predicate places. [2022-12-13 11:39:27,871 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 81 transitions, 340 flow [2022-12-13 11:39:27,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 216.27272727272728) internal successors, (2379), 11 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:27,871 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:27,871 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:27,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 11:39:27,872 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:39:27,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:27,872 INFO L85 PathProgramCache]: Analyzing trace with hash 522233602, now seen corresponding path program 2 times [2022-12-13 11:39:27,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:27,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369565927] [2022-12-13 11:39:27,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:27,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:28,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:28,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:28,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369565927] [2022-12-13 11:39:28,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369565927] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:28,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:28,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 11:39:28,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985528874] [2022-12-13 11:39:28,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:28,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 11:39:28,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:28,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 11:39:28,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-12-13 11:39:30,254 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 499 [2022-12-13 11:39:30,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 81 transitions, 340 flow. Second operand has 11 states, 11 states have (on average 216.27272727272728) internal successors, (2379), 11 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:30,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:30,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 499 [2022-12-13 11:39:30,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:31,045 INFO L130 PetriNetUnfolder]: 1505/2616 cut-off events. [2022-12-13 11:39:31,045 INFO L131 PetriNetUnfolder]: For 322/322 co-relation queries the response was YES. [2022-12-13 11:39:31,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5735 conditions, 2616 events. 1505/2616 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 11065 event pairs, 485 based on Foata normal form. 0/2253 useless extension candidates. Maximal degree in co-relation 5718. Up to 1699 conditions per place. [2022-12-13 11:39:31,051 INFO L137 encePairwiseOnDemand]: 487/499 looper letters, 97 selfloop transitions, 23 changer transitions 10/138 dead transitions. [2022-12-13 11:39:31,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 138 transitions, 735 flow [2022-12-13 11:39:31,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 11:39:31,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 11:39:31,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2269 transitions. [2022-12-13 11:39:31,055 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45470941883767535 [2022-12-13 11:39:31,055 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2269 transitions. [2022-12-13 11:39:31,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2269 transitions. [2022-12-13 11:39:31,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:31,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2269 transitions. [2022-12-13 11:39:31,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 226.9) internal successors, (2269), 10 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:31,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 499.0) internal successors, (5489), 11 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:31,062 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 499.0) internal successors, (5489), 11 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:31,062 INFO L175 Difference]: Start difference. First operand has 89 places, 81 transitions, 340 flow. Second operand 10 states and 2269 transitions. [2022-12-13 11:39:31,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 138 transitions, 735 flow [2022-12-13 11:39:31,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 138 transitions, 701 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-12-13 11:39:31,065 INFO L231 Difference]: Finished difference. Result has 93 places, 82 transitions, 369 flow [2022-12-13 11:39:31,065 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=369, PETRI_PLACES=93, PETRI_TRANSITIONS=82} [2022-12-13 11:39:31,065 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 30 predicate places. [2022-12-13 11:39:31,066 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 82 transitions, 369 flow [2022-12-13 11:39:31,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 216.27272727272728) internal successors, (2379), 11 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:31,066 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:31,066 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:31,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 11:39:31,066 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:39:31,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:31,067 INFO L85 PathProgramCache]: Analyzing trace with hash 521541682, now seen corresponding path program 3 times [2022-12-13 11:39:31,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:31,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620320466] [2022-12-13 11:39:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:31,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:31,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:31,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620320466] [2022-12-13 11:39:31,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620320466] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:31,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:31,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 11:39:31,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43099608] [2022-12-13 11:39:31,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:31,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 11:39:31,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:31,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 11:39:31,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-13 11:39:32,341 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 499 [2022-12-13 11:39:32,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 82 transitions, 369 flow. Second operand has 11 states, 11 states have (on average 216.27272727272728) internal successors, (2379), 11 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:32,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:32,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 499 [2022-12-13 11:39:32,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:32,918 INFO L130 PetriNetUnfolder]: 1492/2585 cut-off events. [2022-12-13 11:39:32,918 INFO L131 PetriNetUnfolder]: For 430/430 co-relation queries the response was YES. [2022-12-13 11:39:32,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5714 conditions, 2585 events. 1492/2585 cut-off events. For 430/430 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 10858 event pairs, 474 based on Foata normal form. 0/2235 useless extension candidates. Maximal degree in co-relation 5696. Up to 1699 conditions per place. [2022-12-13 11:39:32,925 INFO L137 encePairwiseOnDemand]: 489/499 looper letters, 92 selfloop transitions, 21 changer transitions 10/130 dead transitions. [2022-12-13 11:39:32,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 130 transitions, 722 flow [2022-12-13 11:39:32,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:39:32,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:39:32,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2045 transitions. [2022-12-13 11:39:32,928 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45535515475395233 [2022-12-13 11:39:32,928 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2045 transitions. [2022-12-13 11:39:32,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2045 transitions. [2022-12-13 11:39:32,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:32,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2045 transitions. [2022-12-13 11:39:32,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 227.22222222222223) internal successors, (2045), 9 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:32,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:32,934 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:32,934 INFO L175 Difference]: Start difference. First operand has 93 places, 82 transitions, 369 flow. Second operand 9 states and 2045 transitions. [2022-12-13 11:39:32,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 130 transitions, 722 flow [2022-12-13 11:39:32,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 688 flow, removed 1 selfloop flow, removed 8 redundant places. [2022-12-13 11:39:32,938 INFO L231 Difference]: Finished difference. Result has 91 places, 80 transitions, 369 flow [2022-12-13 11:39:32,938 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=369, PETRI_PLACES=91, PETRI_TRANSITIONS=80} [2022-12-13 11:39:32,938 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 28 predicate places. [2022-12-13 11:39:32,938 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 80 transitions, 369 flow [2022-12-13 11:39:32,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 216.27272727272728) internal successors, (2379), 11 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:32,939 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:32,939 INFO L209 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] [2022-12-13 11:39:32,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 11:39:32,939 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)] === [2022-12-13 11:39:32,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:32,939 INFO L85 PathProgramCache]: Analyzing trace with hash 166867820, now seen corresponding path program 1 times [2022-12-13 11:39:32,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:32,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147292095] [2022-12-13 11:39:32,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:32,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:33,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:33,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147292095] [2022-12-13 11:39:33,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147292095] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:33,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:33,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:39:33,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155624375] [2022-12-13 11:39:33,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:33,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:39:33,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:33,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:39:33,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:39:33,035 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 499 [2022-12-13 11:39:33,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 80 transitions, 369 flow. Second operand has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:33,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:33,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 499 [2022-12-13 11:39:33,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:33,224 INFO L130 PetriNetUnfolder]: 897/1672 cut-off events. [2022-12-13 11:39:33,224 INFO L131 PetriNetUnfolder]: For 455/455 co-relation queries the response was YES. [2022-12-13 11:39:33,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3853 conditions, 1672 events. 897/1672 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 6940 event pairs, 166 based on Foata normal form. 2/1534 useless extension candidates. Maximal degree in co-relation 3835. Up to 1197 conditions per place. [2022-12-13 11:39:33,229 INFO L137 encePairwiseOnDemand]: 493/499 looper letters, 72 selfloop transitions, 7 changer transitions 1/91 dead transitions. [2022-12-13 11:39:33,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 91 transitions, 561 flow [2022-12-13 11:39:33,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:39:33,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:39:33,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 817 transitions. [2022-12-13 11:39:33,231 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5457581830327322 [2022-12-13 11:39:33,231 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 817 transitions. [2022-12-13 11:39:33,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 817 transitions. [2022-12-13 11:39:33,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:33,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 817 transitions. [2022-12-13 11:39:33,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.3333333333333) internal successors, (817), 3 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:33,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:33,234 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:33,234 INFO L175 Difference]: Start difference. First operand has 91 places, 80 transitions, 369 flow. Second operand 3 states and 817 transitions. [2022-12-13 11:39:33,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 91 transitions, 561 flow [2022-12-13 11:39:33,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 91 transitions, 517 flow, removed 1 selfloop flow, removed 8 redundant places. [2022-12-13 11:39:33,238 INFO L231 Difference]: Finished difference. Result has 85 places, 80 transitions, 339 flow [2022-12-13 11:39:33,238 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=339, PETRI_PLACES=85, PETRI_TRANSITIONS=80} [2022-12-13 11:39:33,238 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 22 predicate places. [2022-12-13 11:39:33,239 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 80 transitions, 339 flow [2022-12-13 11:39:33,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:33,239 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:33,239 INFO L209 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] [2022-12-13 11:39:33,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 11:39:33,240 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)] === [2022-12-13 11:39:33,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:33,240 INFO L85 PathProgramCache]: Analyzing trace with hash -2052738280, now seen corresponding path program 1 times [2022-12-13 11:39:33,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:33,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180273706] [2022-12-13 11:39:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:33,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:35,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:35,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180273706] [2022-12-13 11:39:35,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180273706] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:35,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:35,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-12-13 11:39:35,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753592927] [2022-12-13 11:39:35,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:35,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 11:39:35,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:35,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 11:39:35,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-12-13 11:39:39,379 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 499 [2022-12-13 11:39:39,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 80 transitions, 339 flow. Second operand has 23 states, 23 states have (on average 188.52173913043478) internal successors, (4336), 23 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:39,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:39,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 499 [2022-12-13 11:39:39,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:42,895 INFO L130 PetriNetUnfolder]: 1643/3096 cut-off events. [2022-12-13 11:39:42,895 INFO L131 PetriNetUnfolder]: For 573/579 co-relation queries the response was YES. [2022-12-13 11:39:42,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7065 conditions, 3096 events. 1643/3096 cut-off events. For 573/579 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 15557 event pairs, 351 based on Foata normal form. 52/3017 useless extension candidates. Maximal degree in co-relation 7047. Up to 1457 conditions per place. [2022-12-13 11:39:42,916 INFO L137 encePairwiseOnDemand]: 470/499 looper letters, 209 selfloop transitions, 86 changer transitions 26/328 dead transitions. [2022-12-13 11:39:42,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 328 transitions, 1646 flow [2022-12-13 11:39:42,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 11:39:42,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-13 11:39:42,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 7048 transitions. [2022-12-13 11:39:42,942 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39234023602761076 [2022-12-13 11:39:42,942 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 7048 transitions. [2022-12-13 11:39:42,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 7048 transitions. [2022-12-13 11:39:42,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:42,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 7048 transitions. [2022-12-13 11:39:42,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 195.77777777777777) internal successors, (7048), 36 states have internal predecessors, (7048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:42,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 499.0) internal successors, (18463), 37 states have internal predecessors, (18463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:42,991 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 499.0) internal successors, (18463), 37 states have internal predecessors, (18463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:42,991 INFO L175 Difference]: Start difference. First operand has 85 places, 80 transitions, 339 flow. Second operand 36 states and 7048 transitions. [2022-12-13 11:39:42,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 328 transitions, 1646 flow [2022-12-13 11:39:42,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 328 transitions, 1623 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:39:42,996 INFO L231 Difference]: Finished difference. Result has 146 places, 158 transitions, 990 flow [2022-12-13 11:39:42,996 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=990, PETRI_PLACES=146, PETRI_TRANSITIONS=158} [2022-12-13 11:39:42,997 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 83 predicate places. [2022-12-13 11:39:42,997 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 158 transitions, 990 flow [2022-12-13 11:39:42,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 188.52173913043478) internal successors, (4336), 23 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:42,997 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:42,997 INFO L209 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] [2022-12-13 11:39:42,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 11:39:42,998 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:39:42,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:42,998 INFO L85 PathProgramCache]: Analyzing trace with hash 2044770520, now seen corresponding path program 2 times [2022-12-13 11:39:42,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:42,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739431822] [2022-12-13 11:39:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:42,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:43,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:43,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739431822] [2022-12-13 11:39:43,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739431822] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:43,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:43,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 11:39:43,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853604929] [2022-12-13 11:39:43,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:43,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 11:39:43,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:43,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 11:39:43,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:39:44,191 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 499 [2022-12-13 11:39:44,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 158 transitions, 990 flow. Second operand has 14 states, 14 states have (on average 214.5) internal successors, (3003), 14 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:44,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:44,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 499 [2022-12-13 11:39:44,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:45,002 INFO L130 PetriNetUnfolder]: 1248/2346 cut-off events. [2022-12-13 11:39:45,002 INFO L131 PetriNetUnfolder]: For 20265/20273 co-relation queries the response was YES. [2022-12-13 11:39:45,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10202 conditions, 2346 events. 1248/2346 cut-off events. For 20265/20273 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 11049 event pairs, 481 based on Foata normal form. 21/2362 useless extension candidates. Maximal degree in co-relation 10156. Up to 1079 conditions per place. [2022-12-13 11:39:45,012 INFO L137 encePairwiseOnDemand]: 484/499 looper letters, 134 selfloop transitions, 36 changer transitions 27/204 dead transitions. [2022-12-13 11:39:45,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 204 transitions, 1983 flow [2022-12-13 11:39:45,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 11:39:45,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 11:39:45,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3330 transitions. [2022-12-13 11:39:45,016 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44488977955911824 [2022-12-13 11:39:45,016 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3330 transitions. [2022-12-13 11:39:45,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3330 transitions. [2022-12-13 11:39:45,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:45,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3330 transitions. [2022-12-13 11:39:45,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 222.0) internal successors, (3330), 15 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:45,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 499.0) internal successors, (7984), 16 states have internal predecessors, (7984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:45,025 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 499.0) internal successors, (7984), 16 states have internal predecessors, (7984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:45,025 INFO L175 Difference]: Start difference. First operand has 146 places, 158 transitions, 990 flow. Second operand 15 states and 3330 transitions. [2022-12-13 11:39:45,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 204 transitions, 1983 flow [2022-12-13 11:39:45,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 204 transitions, 1698 flow, removed 137 selfloop flow, removed 17 redundant places. [2022-12-13 11:39:45,063 INFO L231 Difference]: Finished difference. Result has 132 places, 121 transitions, 837 flow [2022-12-13 11:39:45,063 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=837, PETRI_PLACES=132, PETRI_TRANSITIONS=121} [2022-12-13 11:39:45,063 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 69 predicate places. [2022-12-13 11:39:45,063 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 121 transitions, 837 flow [2022-12-13 11:39:45,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 214.5) internal successors, (3003), 14 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:45,064 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:45,064 INFO L209 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] [2022-12-13 11:39:45,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 11:39:45,064 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:39:45,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:45,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1285385434, now seen corresponding path program 3 times [2022-12-13 11:39:45,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:45,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623393385] [2022-12-13 11:39:45,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:45,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:45,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:45,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623393385] [2022-12-13 11:39:45,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623393385] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:45,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:45,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 11:39:45,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908456745] [2022-12-13 11:39:45,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:45,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 11:39:45,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:45,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 11:39:45,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:39:46,386 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 499 [2022-12-13 11:39:46,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 121 transitions, 837 flow. Second operand has 14 states, 14 states have (on average 214.5) internal successors, (3003), 14 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:46,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:46,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 499 [2022-12-13 11:39:46,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:47,332 INFO L130 PetriNetUnfolder]: 1574/2944 cut-off events. [2022-12-13 11:39:47,332 INFO L131 PetriNetUnfolder]: For 10458/10466 co-relation queries the response was YES. [2022-12-13 11:39:47,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11160 conditions, 2944 events. 1574/2944 cut-off events. For 10458/10466 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 14598 event pairs, 251 based on Foata normal form. 18/2948 useless extension candidates. Maximal degree in co-relation 11121. Up to 1001 conditions per place. [2022-12-13 11:39:47,343 INFO L137 encePairwiseOnDemand]: 481/499 looper letters, 152 selfloop transitions, 38 changer transitions 17/214 dead transitions. [2022-12-13 11:39:47,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 214 transitions, 1866 flow [2022-12-13 11:39:47,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 11:39:47,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 11:39:47,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3123 transitions. [2022-12-13 11:39:47,346 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44703693100486686 [2022-12-13 11:39:47,346 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3123 transitions. [2022-12-13 11:39:47,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3123 transitions. [2022-12-13 11:39:47,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:47,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3123 transitions. [2022-12-13 11:39:47,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 223.07142857142858) internal successors, (3123), 14 states have internal predecessors, (3123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:47,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 499.0) internal successors, (7485), 15 states have internal predecessors, (7485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:47,354 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 499.0) internal successors, (7485), 15 states have internal predecessors, (7485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:47,354 INFO L175 Difference]: Start difference. First operand has 132 places, 121 transitions, 837 flow. Second operand 14 states and 3123 transitions. [2022-12-13 11:39:47,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 214 transitions, 1866 flow [2022-12-13 11:39:47,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 214 transitions, 1828 flow, removed 7 selfloop flow, removed 8 redundant places. [2022-12-13 11:39:47,368 INFO L231 Difference]: Finished difference. Result has 138 places, 128 transitions, 960 flow [2022-12-13 11:39:47,369 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=960, PETRI_PLACES=138, PETRI_TRANSITIONS=128} [2022-12-13 11:39:47,369 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 75 predicate places. [2022-12-13 11:39:47,369 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 128 transitions, 960 flow [2022-12-13 11:39:47,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 214.5) internal successors, (3003), 14 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:47,370 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:47,370 INFO L209 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] [2022-12-13 11:39:47,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 11:39:47,370 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:39:47,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:47,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1580738380, now seen corresponding path program 4 times [2022-12-13 11:39:47,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:47,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818614863] [2022-12-13 11:39:47,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:47,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:48,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:48,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818614863] [2022-12-13 11:39:48,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818614863] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:48,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:48,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 11:39:48,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755734414] [2022-12-13 11:39:48,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:48,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 11:39:48,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:48,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 11:39:48,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:39:50,068 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 499 [2022-12-13 11:39:50,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 128 transitions, 960 flow. Second operand has 14 states, 14 states have (on average 210.5) internal successors, (2947), 14 states have internal predecessors, (2947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:50,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:50,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 499 [2022-12-13 11:39:50,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:51,086 INFO L130 PetriNetUnfolder]: 1371/2576 cut-off events. [2022-12-13 11:39:51,087 INFO L131 PetriNetUnfolder]: For 10058/10064 co-relation queries the response was YES. [2022-12-13 11:39:51,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10280 conditions, 2576 events. 1371/2576 cut-off events. For 10058/10064 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 12288 event pairs, 216 based on Foata normal form. 14/2579 useless extension candidates. Maximal degree in co-relation 10238. Up to 814 conditions per place. [2022-12-13 11:39:51,098 INFO L137 encePairwiseOnDemand]: 484/499 looper letters, 146 selfloop transitions, 35 changer transitions 20/208 dead transitions. [2022-12-13 11:39:51,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 208 transitions, 1942 flow [2022-12-13 11:39:51,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 11:39:51,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 11:39:51,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3265 transitions. [2022-12-13 11:39:51,101 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4362057448229793 [2022-12-13 11:39:51,102 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3265 transitions. [2022-12-13 11:39:51,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3265 transitions. [2022-12-13 11:39:51,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:51,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3265 transitions. [2022-12-13 11:39:51,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 217.66666666666666) internal successors, (3265), 15 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:51,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 499.0) internal successors, (7984), 16 states have internal predecessors, (7984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:51,109 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 499.0) internal successors, (7984), 16 states have internal predecessors, (7984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:51,109 INFO L175 Difference]: Start difference. First operand has 138 places, 128 transitions, 960 flow. Second operand 15 states and 3265 transitions. [2022-12-13 11:39:51,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 208 transitions, 1942 flow [2022-12-13 11:39:51,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 208 transitions, 1895 flow, removed 5 selfloop flow, removed 9 redundant places. [2022-12-13 11:39:51,129 INFO L231 Difference]: Finished difference. Result has 145 places, 129 transitions, 1018 flow [2022-12-13 11:39:51,129 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1018, PETRI_PLACES=145, PETRI_TRANSITIONS=129} [2022-12-13 11:39:51,129 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 82 predicate places. [2022-12-13 11:39:51,129 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 129 transitions, 1018 flow [2022-12-13 11:39:51,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 210.5) internal successors, (2947), 14 states have internal predecessors, (2947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:51,130 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:51,130 INFO L209 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] [2022-12-13 11:39:51,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 11:39:51,130 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:39:51,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:51,130 INFO L85 PathProgramCache]: Analyzing trace with hash -837170601, now seen corresponding path program 1 times [2022-12-13 11:39:51,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:51,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241926147] [2022-12-13 11:39:51,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:51,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:52,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:52,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241926147] [2022-12-13 11:39:52,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241926147] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:52,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:52,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-12-13 11:39:52,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384222443] [2022-12-13 11:39:52,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:52,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 11:39:52,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:52,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 11:39:52,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-12-13 11:39:53,317 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 499 [2022-12-13 11:39:53,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 129 transitions, 1018 flow. Second operand has 17 states, 17 states have (on average 221.11764705882354) internal successors, (3759), 17 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:53,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:53,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 499 [2022-12-13 11:39:53,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:54,407 INFO L130 PetriNetUnfolder]: 1537/2890 cut-off events. [2022-12-13 11:39:54,407 INFO L131 PetriNetUnfolder]: For 11556/11566 co-relation queries the response was YES. [2022-12-13 11:39:54,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11451 conditions, 2890 events. 1537/2890 cut-off events. For 11556/11566 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 14124 event pairs, 472 based on Foata normal form. 10/2887 useless extension candidates. Maximal degree in co-relation 11406. Up to 1317 conditions per place. [2022-12-13 11:39:54,419 INFO L137 encePairwiseOnDemand]: 483/499 looper letters, 161 selfloop transitions, 38 changer transitions 12/218 dead transitions. [2022-12-13 11:39:54,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 218 transitions, 1948 flow [2022-12-13 11:39:54,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 11:39:54,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 11:39:54,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3002 transitions. [2022-12-13 11:39:54,422 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4627716972406351 [2022-12-13 11:39:54,422 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3002 transitions. [2022-12-13 11:39:54,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3002 transitions. [2022-12-13 11:39:54,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:54,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3002 transitions. [2022-12-13 11:39:54,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 230.92307692307693) internal successors, (3002), 13 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:54,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 499.0) internal successors, (6986), 14 states have internal predecessors, (6986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:54,428 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 499.0) internal successors, (6986), 14 states have internal predecessors, (6986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:54,428 INFO L175 Difference]: Start difference. First operand has 145 places, 129 transitions, 1018 flow. Second operand 13 states and 3002 transitions. [2022-12-13 11:39:54,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 218 transitions, 1948 flow [2022-12-13 11:39:54,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 218 transitions, 1882 flow, removed 6 selfloop flow, removed 12 redundant places. [2022-12-13 11:39:54,447 INFO L231 Difference]: Finished difference. Result has 147 places, 134 transitions, 1069 flow [2022-12-13 11:39:54,448 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1069, PETRI_PLACES=147, PETRI_TRANSITIONS=134} [2022-12-13 11:39:54,448 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 84 predicate places. [2022-12-13 11:39:54,448 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 134 transitions, 1069 flow [2022-12-13 11:39:54,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 221.11764705882354) internal successors, (3759), 17 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:54,448 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:54,449 INFO L209 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] [2022-12-13 11:39:54,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 11:39:54,449 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:39:54,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:54,449 INFO L85 PathProgramCache]: Analyzing trace with hash 79633233, now seen corresponding path program 2 times [2022-12-13 11:39:54,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:54,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116819774] [2022-12-13 11:39:54,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:54,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:40:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:40:01,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:40:01,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116819774] [2022-12-13 11:40:01,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116819774] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:40:01,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:40:01,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-12-13 11:40:01,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914267720] [2022-12-13 11:40:01,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:40:01,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 11:40:01,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:40:01,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 11:40:01,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-12-13 11:40:15,436 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 499 [2022-12-13 11:40:15,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 134 transitions, 1069 flow. Second operand has 19 states, 19 states have (on average 214.89473684210526) internal successors, (4083), 19 states have internal predecessors, (4083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:15,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:40:15,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 499 [2022-12-13 11:40:15,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:40:29,896 INFO L130 PetriNetUnfolder]: 2157/4063 cut-off events. [2022-12-13 11:40:29,896 INFO L131 PetriNetUnfolder]: For 17028/17034 co-relation queries the response was YES. [2022-12-13 11:40:29,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16015 conditions, 4063 events. 2157/4063 cut-off events. For 17028/17034 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 22010 event pairs, 493 based on Foata normal form. 10/4054 useless extension candidates. Maximal degree in co-relation 15969. Up to 1946 conditions per place. [2022-12-13 11:40:29,913 INFO L137 encePairwiseOnDemand]: 481/499 looper letters, 209 selfloop transitions, 57 changer transitions 20/293 dead transitions. [2022-12-13 11:40:29,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 293 transitions, 2628 flow [2022-12-13 11:40:29,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 11:40:29,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 11:40:29,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 5113 transitions. [2022-12-13 11:40:29,917 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44549969504225845 [2022-12-13 11:40:29,917 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 5113 transitions. [2022-12-13 11:40:29,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 5113 transitions. [2022-12-13 11:40:29,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:40:29,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 5113 transitions. [2022-12-13 11:40:29,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 222.30434782608697) internal successors, (5113), 23 states have internal predecessors, (5113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:29,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 499.0) internal successors, (11976), 24 states have internal predecessors, (11976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:29,946 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 499.0) internal successors, (11976), 24 states have internal predecessors, (11976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:29,947 INFO L175 Difference]: Start difference. First operand has 147 places, 134 transitions, 1069 flow. Second operand 23 states and 5113 transitions. [2022-12-13 11:40:29,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 293 transitions, 2628 flow [2022-12-13 11:40:29,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 293 transitions, 2527 flow, removed 5 selfloop flow, removed 9 redundant places. [2022-12-13 11:40:29,976 INFO L231 Difference]: Finished difference. Result has 168 places, 156 transitions, 1368 flow [2022-12-13 11:40:29,976 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1368, PETRI_PLACES=168, PETRI_TRANSITIONS=156} [2022-12-13 11:40:29,977 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 105 predicate places. [2022-12-13 11:40:29,977 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 156 transitions, 1368 flow [2022-12-13 11:40:29,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 214.89473684210526) internal successors, (4083), 19 states have internal predecessors, (4083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:29,977 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:40:29,977 INFO L209 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] [2022-12-13 11:40:29,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 11:40:29,978 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:40:29,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:29,979 INFO L85 PathProgramCache]: Analyzing trace with hash 806100325, now seen corresponding path program 3 times [2022-12-13 11:40:29,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:40:29,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092054015] [2022-12-13 11:40:29,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:40:29,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:40:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:40:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:40:31,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:40:31,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092054015] [2022-12-13 11:40:31,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092054015] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:40:31,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:40:31,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-12-13 11:40:31,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437686373] [2022-12-13 11:40:31,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:40:31,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 11:40:31,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:40:31,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 11:40:31,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2022-12-13 11:40:33,117 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 499 [2022-12-13 11:40:33,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 156 transitions, 1368 flow. Second operand has 17 states, 17 states have (on average 221.11764705882354) internal successors, (3759), 17 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:33,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:40:33,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 499 [2022-12-13 11:40:33,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:40:34,553 INFO L130 PetriNetUnfolder]: 2325/4399 cut-off events. [2022-12-13 11:40:34,553 INFO L131 PetriNetUnfolder]: For 18432/18436 co-relation queries the response was YES. [2022-12-13 11:40:34,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17374 conditions, 4399 events. 2325/4399 cut-off events. For 18432/18436 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 23842 event pairs, 346 based on Foata normal form. 8/4387 useless extension candidates. Maximal degree in co-relation 17320. Up to 1509 conditions per place. [2022-12-13 11:40:34,572 INFO L137 encePairwiseOnDemand]: 483/499 looper letters, 174 selfloop transitions, 52 changer transitions 15/248 dead transitions. [2022-12-13 11:40:34,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 248 transitions, 2407 flow [2022-12-13 11:40:34,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 11:40:34,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 11:40:34,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3223 transitions. [2022-12-13 11:40:34,575 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4613512739765245 [2022-12-13 11:40:34,575 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3223 transitions. [2022-12-13 11:40:34,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3223 transitions. [2022-12-13 11:40:34,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:40:34,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3223 transitions. [2022-12-13 11:40:34,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 230.21428571428572) internal successors, (3223), 14 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:34,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 499.0) internal successors, (7485), 15 states have internal predecessors, (7485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:34,582 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 499.0) internal successors, (7485), 15 states have internal predecessors, (7485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:34,582 INFO L175 Difference]: Start difference. First operand has 168 places, 156 transitions, 1368 flow. Second operand 14 states and 3223 transitions. [2022-12-13 11:40:34,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 248 transitions, 2407 flow [2022-12-13 11:40:34,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 248 transitions, 2286 flow, removed 19 selfloop flow, removed 11 redundant places. [2022-12-13 11:40:34,617 INFO L231 Difference]: Finished difference. Result has 173 places, 158 transitions, 1407 flow [2022-12-13 11:40:34,617 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1407, PETRI_PLACES=173, PETRI_TRANSITIONS=158} [2022-12-13 11:40:34,618 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 110 predicate places. [2022-12-13 11:40:34,618 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 158 transitions, 1407 flow [2022-12-13 11:40:34,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 221.11764705882354) internal successors, (3759), 17 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:34,618 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:40:34,618 INFO L209 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] [2022-12-13 11:40:34,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 11:40:34,618 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:40:34,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:34,619 INFO L85 PathProgramCache]: Analyzing trace with hash 39922411, now seen corresponding path program 1 times [2022-12-13 11:40:34,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:40:34,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518737502] [2022-12-13 11:40:34,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:40:34,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:40:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:40:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:40:36,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:40:36,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518737502] [2022-12-13 11:40:36,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518737502] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:40:36,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:40:36,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-12-13 11:40:36,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848138821] [2022-12-13 11:40:36,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:40:36,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 11:40:36,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:40:36,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 11:40:36,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-12-13 11:40:40,861 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 499 [2022-12-13 11:40:40,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 158 transitions, 1407 flow. Second operand has 22 states, 22 states have (on average 196.6818181818182) internal successors, (4327), 22 states have internal predecessors, (4327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:40,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:40:40,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 499 [2022-12-13 11:40:40,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:40:44,037 INFO L130 PetriNetUnfolder]: 2659/5094 cut-off events. [2022-12-13 11:40:44,037 INFO L131 PetriNetUnfolder]: For 25786/25806 co-relation queries the response was YES. [2022-12-13 11:40:44,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20329 conditions, 5094 events. 2659/5094 cut-off events. For 25786/25806 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 28940 event pairs, 840 based on Foata normal form. 160/5235 useless extension candidates. Maximal degree in co-relation 20276. Up to 3664 conditions per place. [2022-12-13 11:40:44,056 INFO L137 encePairwiseOnDemand]: 473/499 looper letters, 224 selfloop transitions, 80 changer transitions 38/349 dead transitions. [2022-12-13 11:40:44,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 349 transitions, 3241 flow [2022-12-13 11:40:44,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 11:40:44,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 11:40:44,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 7068 transitions. [2022-12-13 11:40:44,062 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4046951044947037 [2022-12-13 11:40:44,063 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 7068 transitions. [2022-12-13 11:40:44,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 7068 transitions. [2022-12-13 11:40:44,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:40:44,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 7068 transitions. [2022-12-13 11:40:44,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 201.94285714285715) internal successors, (7068), 35 states have internal predecessors, (7068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:44,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 499.0) internal successors, (17964), 36 states have internal predecessors, (17964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:44,079 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 499.0) internal successors, (17964), 36 states have internal predecessors, (17964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:44,079 INFO L175 Difference]: Start difference. First operand has 173 places, 158 transitions, 1407 flow. Second operand 35 states and 7068 transitions. [2022-12-13 11:40:44,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 349 transitions, 3241 flow [2022-12-13 11:40:44,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 349 transitions, 3107 flow, removed 8 selfloop flow, removed 10 redundant places. [2022-12-13 11:40:44,131 INFO L231 Difference]: Finished difference. Result has 219 places, 227 transitions, 2347 flow [2022-12-13 11:40:44,131 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2347, PETRI_PLACES=219, PETRI_TRANSITIONS=227} [2022-12-13 11:40:44,131 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 156 predicate places. [2022-12-13 11:40:44,132 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 227 transitions, 2347 flow [2022-12-13 11:40:44,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 196.6818181818182) internal successors, (4327), 22 states have internal predecessors, (4327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:44,132 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:40:44,132 INFO L209 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] [2022-12-13 11:40:44,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 11:40:44,132 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:40:44,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:44,133 INFO L85 PathProgramCache]: Analyzing trace with hash -181417869, now seen corresponding path program 2 times [2022-12-13 11:40:44,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:40:44,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728816031] [2022-12-13 11:40:44,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:40:44,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:40:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:43:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:43:53,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:43:53,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728816031] [2022-12-13 11:43:53,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728816031] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:43:53,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:43:53,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-12-13 11:43:53,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646509694] [2022-12-13 11:43:53,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:43:53,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 11:43:53,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:43:53,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 11:43:53,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-12-13 11:45:50,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:45:54,493 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 499 [2022-12-13 11:45:54,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 227 transitions, 2347 flow. Second operand has 23 states, 23 states have (on average 197.6086956521739) internal successors, (4545), 23 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:54,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:54,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 499 [2022-12-13 11:45:54,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:46:16,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:46:20,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:46:21,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:46:28,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:46:38,924 WARN L233 SmtUtils]: Spent 8.29s on a formula simplification that was a NOOP. DAG size: 143 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:46:47,571 WARN L233 SmtUtils]: Spent 7.72s on a formula simplification that was a NOOP. DAG size: 138 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:47:02,518 WARN L233 SmtUtils]: Spent 9.38s on a formula simplification that was a NOOP. DAG size: 159 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:47:12,833 WARN L233 SmtUtils]: Spent 9.01s on a formula simplification that was a NOOP. DAG size: 154 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:47:27,753 WARN L233 SmtUtils]: Spent 9.84s on a formula simplification that was a NOOP. DAG size: 151 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:47:40,289 WARN L233 SmtUtils]: Spent 11.25s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:47:51,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:47:54,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:47:56,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:48:03,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:48:05,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:48:12,109 INFO L130 PetriNetUnfolder]: 2924/5609 cut-off events. [2022-12-13 11:48:12,109 INFO L131 PetriNetUnfolder]: For 104811/104857 co-relation queries the response was YES. [2022-12-13 11:48:12,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29989 conditions, 5609 events. 2924/5609 cut-off events. For 104811/104857 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 32752 event pairs, 1123 based on Foata normal form. 78/5666 useless extension candidates. Maximal degree in co-relation 29914. Up to 4596 conditions per place. [2022-12-13 11:48:12,150 INFO L137 encePairwiseOnDemand]: 472/499 looper letters, 283 selfloop transitions, 60 changer transitions 17/367 dead transitions. [2022-12-13 11:48:12,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 367 transitions, 4174 flow [2022-12-13 11:48:12,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 11:48:12,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 11:48:12,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5697 transitions. [2022-12-13 11:48:12,156 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40774405954766674 [2022-12-13 11:48:12,157 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5697 transitions. [2022-12-13 11:48:12,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5697 transitions. [2022-12-13 11:48:12,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:48:12,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5697 transitions. [2022-12-13 11:48:12,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 203.46428571428572) internal successors, (5697), 28 states have internal predecessors, (5697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:48:12,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 499.0) internal successors, (14471), 29 states have internal predecessors, (14471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:48:12,171 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 499.0) internal successors, (14471), 29 states have internal predecessors, (14471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:48:12,171 INFO L175 Difference]: Start difference. First operand has 219 places, 227 transitions, 2347 flow. Second operand 28 states and 5697 transitions. [2022-12-13 11:48:12,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 367 transitions, 4174 flow [2022-12-13 11:48:12,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 367 transitions, 3959 flow, removed 92 selfloop flow, removed 3 redundant places. [2022-12-13 11:48:12,409 INFO L231 Difference]: Finished difference. Result has 265 places, 282 transitions, 3150 flow [2022-12-13 11:48:12,410 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=2144, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3150, PETRI_PLACES=265, PETRI_TRANSITIONS=282} [2022-12-13 11:48:12,410 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 202 predicate places. [2022-12-13 11:48:12,410 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 282 transitions, 3150 flow [2022-12-13 11:48:12,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 197.6086956521739) internal successors, (4545), 23 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:48:12,411 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:48:12,411 INFO L209 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] [2022-12-13 11:48:12,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 11:48:12,411 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:48:12,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:48:12,411 INFO L85 PathProgramCache]: Analyzing trace with hash 490213477, now seen corresponding path program 3 times [2022-12-13 11:48:12,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:48:12,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868562880] [2022-12-13 11:48:12,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:48:12,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:48:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:48:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:48:15,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:48:15,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868562880] [2022-12-13 11:48:15,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868562880] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:48:15,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:48:15,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-12-13 11:48:15,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564796480] [2022-12-13 11:48:15,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:48:15,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 11:48:15,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:48:15,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 11:48:15,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-12-13 11:48:26,514 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 499 [2022-12-13 11:48:26,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 282 transitions, 3150 flow. Second operand has 22 states, 22 states have (on average 194.6818181818182) internal successors, (4283), 22 states have internal predecessors, (4283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:48:26,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:48:26,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 499 [2022-12-13 11:48:26,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:48:35,686 INFO L130 PetriNetUnfolder]: 3197/6174 cut-off events. [2022-12-13 11:48:35,686 INFO L131 PetriNetUnfolder]: For 310004/310050 co-relation queries the response was YES. [2022-12-13 11:48:35,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39691 conditions, 6174 events. 3197/6174 cut-off events. For 310004/310050 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 37396 event pairs, 1056 based on Foata normal form. 104/6257 useless extension candidates. Maximal degree in co-relation 39589. Up to 5013 conditions per place. [2022-12-13 11:48:35,742 INFO L137 encePairwiseOnDemand]: 473/499 looper letters, 327 selfloop transitions, 63 changer transitions 19/416 dead transitions. [2022-12-13 11:48:35,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 416 transitions, 5393 flow [2022-12-13 11:48:35,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 11:48:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 11:48:35,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5997 transitions. [2022-12-13 11:48:35,748 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4006012024048096 [2022-12-13 11:48:35,748 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5997 transitions. [2022-12-13 11:48:35,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5997 transitions. [2022-12-13 11:48:35,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:48:35,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5997 transitions. [2022-12-13 11:48:35,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 199.9) internal successors, (5997), 30 states have internal predecessors, (5997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:48:35,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 499.0) internal successors, (15469), 31 states have internal predecessors, (15469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:48:35,763 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 499.0) internal successors, (15469), 31 states have internal predecessors, (15469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:48:35,763 INFO L175 Difference]: Start difference. First operand has 265 places, 282 transitions, 3150 flow. Second operand 30 states and 5997 transitions. [2022-12-13 11:48:35,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 416 transitions, 5393 flow [2022-12-13 11:48:36,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 416 transitions, 4977 flow, removed 208 selfloop flow, removed 0 redundant places. [2022-12-13 11:48:36,206 INFO L231 Difference]: Finished difference. Result has 314 places, 326 transitions, 3669 flow [2022-12-13 11:48:36,207 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3669, PETRI_PLACES=314, PETRI_TRANSITIONS=326} [2022-12-13 11:48:36,207 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 251 predicate places. [2022-12-13 11:48:36,207 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 326 transitions, 3669 flow [2022-12-13 11:48:36,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 194.6818181818182) internal successors, (4283), 22 states have internal predecessors, (4283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:48:36,207 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:48:36,208 INFO L209 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] [2022-12-13 11:48:36,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 11:48:36,208 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:48:36,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:48:36,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1795157365, now seen corresponding path program 4 times [2022-12-13 11:48:36,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:48:36,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946742371] [2022-12-13 11:48:36,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:48:36,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:48:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat