How to use SetupEvent method of Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail class

Best Coyote code snippet using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.SetupEvent

ChainReplicationTests.cs

Source:ChainReplicationTests.cs Github

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...51 if (i is 0)52 {53 server = this.CreateActor(54 typeof(ChainReplicationServer),55 new ChainReplicationServer.SetupEvent(i, true, false));56 }57 else if (i == this.NumOfServers - 1)58 {59 server = this.CreateActor(60 typeof(ChainReplicationServer),61 new ChainReplicationServer.SetupEvent(i, false, true));62 }63 else64 {65 server = this.CreateActor(66 typeof(ChainReplicationServer),67 new ChainReplicationServer.SetupEvent(i, false, false));68 }69 this.Servers.Add(server);70 }71 this.Monitor<InvariantMonitor>(72 new InvariantMonitor.SetupEvent(this.Servers));73 this.Monitor<ServerResponseSeqMonitor>(74 new ServerResponseSeqMonitor.SetupEvent(this.Servers));75 for (int i = 0; i < this.NumOfServers; i++)76 {77 ActorId pred;78 ActorId succ;79 if (i > 0)80 {81 pred = this.Servers[i - 1];82 }83 else84 {85 pred = this.Servers[0];86 }87 if (i < this.NumOfServers - 1)88 {89 succ = this.Servers[i + 1];90 }91 else92 {93 succ = this.Servers[this.NumOfServers - 1];94 }95 this.SendEvent(this.Servers[i], new ChainReplicationServer.PredSucc(pred, succ));96 }97 this.Clients.Add(this.CreateActor(typeof(Client),98 new Client.SetupEvent(0, this.Servers[0], this.Servers[this.NumOfServers - 1], 1)));99 this.Clients.Add(this.CreateActor(typeof(Client),100 new Client.SetupEvent(1, this.Servers[0], this.Servers[this.NumOfServers - 1], 100)));101 this.CreateActor(typeof(ChainReplicationMaster),102 new ChainReplicationMaster.SetupEvent(this.Servers, this.Clients));103 this.SendEvent(this.Id, HaltEvent.Instance);104 return Task.CompletedTask;105 }106 }107 private class FailureDetector : StateMachine108 {109 internal class SetupEvent : Event110 {111 public ActorId Main;112 public List<ActorId> Servers;113 public SetupEvent(ActorId main, List<ActorId> servers)114 : base()115 {116 this.Main = main;117 this.Servers = servers;118 }119 }120 internal class FailureDetected : Event121 {122 public ActorId Server;123 public FailureDetected(ActorId server)124 : base()125 {126 this.Server = server;127 }128 }129 internal class FailureCorrected : Event130 {131 public List<ActorId> Servers;132 public FailureCorrected(List<ActorId> servers)133 : base()134 {135 this.Servers = servers;136 }137 }138 internal class Ping : Event139 {140 public ActorId Target;141 public Ping(ActorId target)142 : base()143 {144 this.Target = target;145 }146 }147 internal class Pong : Event148 {149 }150 private class InjectFailure : Event151 {152 }153 private class Local : Event154 {155 }156 private ActorId Main;157 private List<ActorId> Servers;158 private int CheckNodeIdx;159 private int Failures;160 [Start]161 [OnEntry(nameof(InitOnEntry))]162 [OnEventGotoState(typeof(Local), typeof(StartMonitoring))]163 private class Init : State164 {165 }166 private void InitOnEntry(Event e)167 {168 this.Main = (e as SetupEvent).Main;169 this.Servers = (e as SetupEvent).Servers;170 this.CheckNodeIdx = 0;171 this.Failures = 100;172 this.RaiseEvent(new Local());173 }174 [OnEntry(nameof(StartMonitoringOnEntry))]175 [OnEventGotoState(typeof(Pong), typeof(StartMonitoring), nameof(HandlePong))]176 [OnEventGotoState(typeof(InjectFailure), typeof(HandleFailure))]177 private class StartMonitoring : State178 {179 }180 private void StartMonitoringOnEntry()181 {182 if (this.Failures < 1)183 {184 this.RaiseHaltEvent();185 }186 else187 {188 this.SendEvent(this.Servers[this.CheckNodeIdx], new Ping(this.Id));189 if (this.Servers.Count > 1)190 {191 if (this.RandomBoolean())192 {193 this.SendEvent(this.Id, new InjectFailure());194 }195 else196 {197 this.SendEvent(this.Id, new Pong());198 }199 }200 else201 {202 this.SendEvent(this.Id, new Pong());203 }204 this.Failures--;205 }206 }207 private void HandlePong()208 {209 this.CheckNodeIdx++;210 if (this.CheckNodeIdx == this.Servers.Count)211 {212 this.CheckNodeIdx = 0;213 }214 }215 [OnEntry(nameof(HandleFailureOnEntry))]216 [OnEventGotoState(typeof(FailureCorrected), typeof(StartMonitoring), nameof(ProcessFailureCorrected))]217 [IgnoreEvents(typeof(Pong), typeof(InjectFailure))]218 private class HandleFailure : State219 {220 }221 private void HandleFailureOnEntry()222 {223 this.SendEvent(this.Main, new FailureDetected(this.Servers[this.CheckNodeIdx]));224 }225 private void ProcessFailureCorrected(Event e)226 {227 this.CheckNodeIdx = 0;228 this.Servers = (e as FailureCorrected).Servers;229 }230 }231 private class ChainReplicationMaster : StateMachine232 {233 internal class SetupEvent : Event234 {235 public List<ActorId> Servers;236 public List<ActorId> Clients;237 public SetupEvent(List<ActorId> servers, List<ActorId> clients)238 : base()239 {240 this.Servers = servers;241 this.Clients = clients;242 }243 }244 internal class BecomeHead : Event245 {246 public ActorId Target;247 public BecomeHead(ActorId target)248 : base()249 {250 this.Target = target;251 }252 }253 internal class BecomeTail : Event254 {255 public ActorId Target;256 public BecomeTail(ActorId target)257 : base()258 {259 this.Target = target;260 }261 }262 internal class Success : Event263 {264 }265 internal class HeadChanged : Event266 {267 }268 internal class TailChanged : Event269 {270 }271 private class HeadFailed : Event272 {273 }274 private class TailFailed : Event275 {276 }277 private class ServerFailed : Event278 {279 }280 private class FixSuccessor : Event281 {282 }283 private class FixPredecessor : Event284 {285 }286 private class Local : Event287 {288 }289 private class Done : Event290 {291 }292 private List<ActorId> Servers;293 private List<ActorId> Clients;294 private ActorId FailureDetector;295 private ActorId Head;296 private ActorId Tail;297 private int FaultyNodeIndex;298 private int LastUpdateReceivedSucc;299 private int LastAckSent;300 [Start]301 [OnEntry(nameof(InitOnEntry))]302 [OnEventGotoState(typeof(Local), typeof(WaitForFailure))]303 private class Init : State304 {305 }306 private void InitOnEntry(Event e)307 {308 this.Servers = (e as SetupEvent).Servers;309 this.Clients = (e as SetupEvent).Clients;310 this.FailureDetector = this.CreateActor(311 typeof(FailureDetector),312 new FailureDetector.SetupEvent(this.Id, this.Servers));313 this.Head = this.Servers[0];314 this.Tail = this.Servers[this.Servers.Count - 1];315 this.RaiseEvent(new Local());316 }317 [OnEventGotoState(typeof(HeadFailed), typeof(CorrectHeadFailure))]318 [OnEventGotoState(typeof(TailFailed), typeof(CorrectTailFailure))]319 [OnEventGotoState(typeof(ServerFailed), typeof(CorrectServerFailure))]320 [OnEventDoAction(typeof(FailureDetector.FailureDetected), nameof(CheckWhichNodeFailed))]321 private class WaitForFailure : State322 {323 }324 private void CheckWhichNodeFailed(Event e)325 {326 this.Assert(this.Servers.Count > 1, "All nodes have failed.");327 var failedServer = (e as FailureDetector.FailureDetected).Server;328 if (this.Head.Equals(failedServer))329 {330 this.RaiseEvent(new HeadFailed());331 }332 else if (this.Tail.Equals(failedServer))333 {334 this.RaiseEvent(new TailFailed());335 }336 else337 {338 for (int i = 0; i < this.Servers.Count - 1; i++)339 {340 if (this.Servers[i].Equals(failedServer))341 {342 this.FaultyNodeIndex = i;343 }344 }345 this.RaiseEvent(new ServerFailed());346 }347 }348 [OnEntry(nameof(CorrectHeadFailureOnEntry))]349 [OnEventGotoState(typeof(Done), typeof(WaitForFailure), nameof(UpdateFailureDetector))]350 [OnEventDoAction(typeof(HeadChanged), nameof(UpdateClients))]351 private class CorrectHeadFailure : State352 {353 }354 private void CorrectHeadFailureOnEntry()355 {356 this.Servers.RemoveAt(0);357 this.Monitor<InvariantMonitor>(358 new InvariantMonitor.UpdateServers(this.Servers));359 this.Monitor<ServerResponseSeqMonitor>(360 new ServerResponseSeqMonitor.UpdateServers(this.Servers));361 this.Head = this.Servers[0];362 this.SendEvent(this.Head, new BecomeHead(this.Id));363 }364 private void UpdateClients()365 {366 for (int i = 0; i < this.Clients.Count; i++)367 {368 this.SendEvent(this.Clients[i], new Client.UpdateHeadTail(this.Head, this.Tail));369 }370 this.RaiseEvent(new Done());371 }372 private void UpdateFailureDetector()373 {374 this.SendEvent(this.FailureDetector, new FailureDetector.FailureCorrected(this.Servers));375 }376 [OnEntry(nameof(CorrectTailFailureOnEntry))]377 [OnEventGotoState(typeof(Done), typeof(WaitForFailure), nameof(UpdateFailureDetector))]378 [OnEventDoAction(typeof(TailChanged), nameof(UpdateClients))]379 private class CorrectTailFailure : State380 {381 }382 private void CorrectTailFailureOnEntry()383 {384 this.Servers.RemoveAt(this.Servers.Count - 1);385 this.Monitor<InvariantMonitor>(386 new InvariantMonitor.UpdateServers(this.Servers));387 this.Monitor<ServerResponseSeqMonitor>(388 new ServerResponseSeqMonitor.UpdateServers(this.Servers));389 this.Tail = this.Servers[this.Servers.Count - 1];390 this.SendEvent(this.Tail, new BecomeTail(this.Id));391 }392 [OnEntry(nameof(CorrectServerFailureOnEntry))]393 [OnEventGotoState(typeof(Done), typeof(WaitForFailure), nameof(UpdateFailureDetector))]394 [OnEventDoAction(typeof(FixSuccessor), nameof(UpdateClients))]395 [OnEventDoAction(typeof(FixPredecessor), nameof(ProcessFixPredecessor))]396 [OnEventDoAction(typeof(ChainReplicationServer.NewSuccInfo), nameof(SetLastUpdate))]397 [OnEventDoAction(typeof(Success), nameof(ProcessSuccess))]398 private class CorrectServerFailure : State399 {400 }401 private void CorrectServerFailureOnEntry()402 {403 this.Servers.RemoveAt(this.FaultyNodeIndex);404 this.Monitor<InvariantMonitor>(405 new InvariantMonitor.UpdateServers(this.Servers));406 this.Monitor<ServerResponseSeqMonitor>(407 new ServerResponseSeqMonitor.UpdateServers(this.Servers));408 this.RaiseEvent(new FixSuccessor());409 }410 private void ProcessFixPredecessor()411 {412 this.SendEvent(this.Servers[this.FaultyNodeIndex - 1], new ChainReplicationServer.NewSuccessor(413 this.Id, this.Servers[this.FaultyNodeIndex], this.LastAckSent, this.LastUpdateReceivedSucc));414 }415 private void SetLastUpdate(Event e)416 {417 this.LastUpdateReceivedSucc = (e as418 ChainReplicationServer.NewSuccInfo).LastUpdateReceivedSucc;419 this.LastAckSent = (e as420 ChainReplicationServer.NewSuccInfo).LastAckSent;421 this.RaiseEvent(new FixPredecessor());422 }423 private void ProcessSuccess() => this.RaiseEvent(new Done());424 }425 private class ChainReplicationServer : StateMachine426 {427 internal class SetupEvent : Event428 {429 public int Id;430 public bool IsHead;431 public bool IsTail;432 public SetupEvent(int id, bool isHead, bool isTail)433 : base()434 {435 this.Id = id;436 this.IsHead = isHead;437 this.IsTail = isTail;438 }439 }440 internal class PredSucc : Event441 {442 public ActorId Predecessor;443 public ActorId Successor;444 public PredSucc(ActorId pred, ActorId succ)445 : base()446 {447 this.Predecessor = pred;448 this.Successor = succ;449 }450 }451 internal class ForwardUpdate : Event452 {453 public ActorId Predecessor;454 public int NextSeqId;455 public ActorId Client;456 public int Key;457 public int Value;458 public ForwardUpdate(ActorId pred, int nextSeqId, ActorId client, int key, int val)459 : base()460 {461 this.Predecessor = pred;462 this.NextSeqId = nextSeqId;463 this.Client = client;464 this.Key = key;465 this.Value = val;466 }467 }468 internal class BackwardAck : Event469 {470 public int NextSeqId;471 public BackwardAck(int nextSeqId)472 : base()473 {474 this.NextSeqId = nextSeqId;475 }476 }477 internal class NewPredecessor : Event478 {479 public ActorId Main;480 public ActorId Predecessor;481 public NewPredecessor(ActorId main, ActorId pred)482 : base()483 {484 this.Main = main;485 this.Predecessor = pred;486 }487 }488 internal class NewSuccessor : Event489 {490 public ActorId Main;491 public ActorId Successor;492 public int LastUpdateReceivedSucc;493 public int LastAckSent;494 public NewSuccessor(ActorId main, ActorId succ,495 int lastUpdateReceivedSucc, int lastAckSent)496 : base()497 {498 this.Main = main;499 this.Successor = succ;500 this.LastUpdateReceivedSucc = lastUpdateReceivedSucc;501 this.LastAckSent = lastAckSent;502 }503 }504 internal class NewSuccInfo : Event505 {506 public int LastUpdateReceivedSucc;507 public int LastAckSent;508 public NewSuccInfo(int lastUpdateReceivedSucc, int lastAckSent)509 : base()510 {511 this.LastUpdateReceivedSucc = lastUpdateReceivedSucc;512 this.LastAckSent = lastAckSent;513 }514 }515 internal class ResponseToQuery : Event516 {517 public int Value;518 public ResponseToQuery(int val)519 : base()520 {521 this.Value = val;522 }523 }524 internal class ResponseToUpdate : Event525 {526 }527 private class Local : Event528 {529 }530 private int ServerId;531 private bool IsHead;532 private bool IsTail;533 private ActorId Predecessor;534 private ActorId Successor;535 private Dictionary<int, int> KeyValueStore;536 private List<int> History;537 private List<SentLog> SentHistory;538 private int NextSeqId;539 [Start]540 [OnEntry(nameof(InitOnEntry))]541 [OnEventGotoState(typeof(Local), typeof(WaitForRequest))]542 [OnEventDoAction(typeof(PredSucc), nameof(SetupPredSucc))]543 [DeferEvents(typeof(Client.Update), typeof(Client.Query),544 typeof(BackwardAck), typeof(ForwardUpdate))]545 private class Init : State546 {547 }548 private void InitOnEntry(Event e)549 {550 this.ServerId = (e as SetupEvent).Id;551 this.IsHead = (e as SetupEvent).IsHead;552 this.IsTail = (e as SetupEvent).IsTail;553 this.KeyValueStore = new Dictionary<int, int>();554 this.History = new List<int>();555 this.SentHistory = new List<SentLog>();556 this.NextSeqId = 0;557 }558 private void SetupPredSucc(Event e)559 {560 this.Predecessor = (e as PredSucc).Predecessor;561 this.Successor = (e as PredSucc).Successor;562 this.RaiseEvent(new Local());563 }564 [OnEventGotoState(typeof(Client.Update), typeof(ProcessUpdate), nameof(ProcessUpdateAction))]565 [OnEventGotoState(typeof(ForwardUpdate), typeof(ProcessFwdUpdate))]566 [OnEventGotoState(typeof(BackwardAck), typeof(ProcessBckAck))]567 [OnEventDoAction(typeof(Client.Query), nameof(ProcessQueryAction))]568 [OnEventDoAction(typeof(NewPredecessor), nameof(UpdatePredecessor))]569 [OnEventDoAction(typeof(NewSuccessor), nameof(UpdateSuccessor))]570 [OnEventDoAction(typeof(ChainReplicationMaster.BecomeHead), nameof(ProcessBecomeHead))]571 [OnEventDoAction(typeof(ChainReplicationMaster.BecomeTail), nameof(ProcessBecomeTail))]572 [OnEventDoAction(typeof(FailureDetector.Ping), nameof(SendPong))]573 private class WaitForRequest : State574 {575 }576 private void ProcessUpdateAction()577 {578 this.NextSeqId++;579 this.Assert(this.IsHead, "Server {0} is not head", this.ServerId);580 }581 private void ProcessQueryAction(Event e)582 {583 var client = (e as Client.Query).Client;584 var key = (e as Client.Query).Key;585 this.Assert(this.IsTail, "Server {0} is not tail", this.Id);586 if (this.KeyValueStore.ContainsKey(key))587 {588 this.Monitor<ServerResponseSeqMonitor>(new ServerResponseSeqMonitor.ResponseToQuery(589 this.Id, key, this.KeyValueStore[key]));590 this.SendEvent(client, new ResponseToQuery(this.KeyValueStore[key]));591 }592 else593 {594 this.SendEvent(client, new ResponseToQuery(-1));595 }596 }597 private void ProcessBecomeHead(Event e)598 {599 this.IsHead = true;600 this.Predecessor = this.Id;601 var target = (e as ChainReplicationMaster.BecomeHead).Target;602 this.SendEvent(target, new ChainReplicationMaster.HeadChanged());603 }604 private void ProcessBecomeTail(Event e)605 {606 this.IsTail = true;607 this.Successor = this.Id;608 for (int i = 0; i < this.SentHistory.Count; i++)609 {610 this.Monitor<ServerResponseSeqMonitor>(new ServerResponseSeqMonitor.ResponseToUpdate(611 this.Id, this.SentHistory[i].Key, this.SentHistory[i].Value));612 this.SendEvent(this.SentHistory[i].Client, new ResponseToUpdate());613 this.SendEvent(this.Predecessor, new BackwardAck(this.SentHistory[i].NextSeqId));614 }615 var target = (e as ChainReplicationMaster.BecomeTail).Target;616 this.SendEvent(target, new ChainReplicationMaster.TailChanged());617 }618 private void SendPong(Event e)619 {620 var target = (e as FailureDetector.Ping).Target;621 this.SendEvent(target, new FailureDetector.Pong());622 }623 private void UpdatePredecessor(Event e)624 {625 var main = (e as NewPredecessor).Main;626 this.Predecessor = (e as NewPredecessor).Predecessor;627 if (this.History.Count > 0)628 {629 if (this.SentHistory.Count > 0)630 {631 this.SendEvent(main, new NewSuccInfo(632 this.History[this.History.Count - 1],633 this.SentHistory[0].NextSeqId));634 }635 else636 {637 this.SendEvent(main, new NewSuccInfo(638 this.History[this.History.Count - 1],639 this.History[this.History.Count - 1]));640 }641 }642 }643 private void UpdateSuccessor(Event e)644 {645 var main = (e as NewSuccessor).Main;646 this.Successor = (e as NewSuccessor).Successor;647 var lastUpdateReceivedSucc = (e as NewSuccessor).LastUpdateReceivedSucc;648 var lastAckSent = (e as NewSuccessor).LastAckSent;649 if (this.SentHistory.Count > 0)650 {651 for (int i = 0; i < this.SentHistory.Count; i++)652 {653 if (this.SentHistory[i].NextSeqId > lastUpdateReceivedSucc)654 {655 this.SendEvent(this.Successor, new ForwardUpdate(this.Id, this.SentHistory[i].NextSeqId,656 this.SentHistory[i].Client, this.SentHistory[i].Key, this.SentHistory[i].Value));657 }658 }659 int tempIndex = -1;660 for (int i = this.SentHistory.Count - 1; i >= 0; i--)661 {662 if (this.SentHistory[i].NextSeqId == lastAckSent)663 {664 tempIndex = i;665 }666 }667 for (int i = 0; i < tempIndex; i++)668 {669 this.SendEvent(this.Predecessor, new BackwardAck(this.SentHistory[0].NextSeqId));670 this.SentHistory.RemoveAt(0);671 }672 }673 this.SendEvent(main, new ChainReplicationMaster.Success());674 }675 [OnEntry(nameof(ProcessUpdateOnEntry))]676 [OnEventGotoState(typeof(Local), typeof(WaitForRequest))]677 private class ProcessUpdate : State678 {679 }680 private void ProcessUpdateOnEntry(Event e)681 {682 var client = (e as Client.Update).Client;683 var key = (e as Client.Update).Key;684 var value = (e as Client.Update).Value;685 if (this.KeyValueStore.ContainsKey(key))686 {687 this.KeyValueStore[key] = value;688 }689 else690 {691 this.KeyValueStore.Add(key, value);692 }693 this.History.Add(this.NextSeqId);694 this.Monitor<InvariantMonitor>(695 new InvariantMonitor.HistoryUpdate(this.Id, new List<int>(this.History)));696 this.SentHistory.Add(new SentLog(this.NextSeqId, client, key, value));697 this.Monitor<InvariantMonitor>(698 new InvariantMonitor.SentUpdate(this.Id, new List<SentLog>(this.SentHistory)));699 this.SendEvent(this.Successor, new ForwardUpdate(this.Id, this.NextSeqId, client, key, value));700 this.RaiseEvent(new Local());701 }702 [OnEntry(nameof(ProcessFwdUpdateOnEntry))]703 [OnEventGotoState(typeof(Local), typeof(WaitForRequest))]704 private class ProcessFwdUpdate : State705 {706 }707 private void ProcessFwdUpdateOnEntry(Event e)708 {709 var pred = (e as ForwardUpdate).Predecessor;710 var nextSeqId = (e as ForwardUpdate).NextSeqId;711 var client = (e as ForwardUpdate).Client;712 var key = (e as ForwardUpdate).Key;713 var value = (e as ForwardUpdate).Value;714 if (pred.Equals(this.Predecessor))715 {716 this.NextSeqId = nextSeqId;717 if (this.KeyValueStore.ContainsKey(key))718 {719 this.KeyValueStore[key] = value;720 }721 else722 {723 this.KeyValueStore.Add(key, value);724 }725 if (!this.IsTail)726 {727 this.History.Add(nextSeqId);728 this.Monitor<InvariantMonitor>(729 new InvariantMonitor.HistoryUpdate(this.Id, new List<int>(this.History)));730 this.SentHistory.Add(new SentLog(this.NextSeqId, client, key, value));731 this.Monitor<InvariantMonitor>(732 new InvariantMonitor.SentUpdate(this.Id, new List<SentLog>(this.SentHistory)));733 this.SendEvent(this.Successor, new ForwardUpdate(this.Id, this.NextSeqId, client, key, value));734 }735 else736 {737 if (!this.IsHead)738 {739 this.History.Add(nextSeqId);740 }741 this.Monitor<ServerResponseSeqMonitor>(new ServerResponseSeqMonitor.ResponseToUpdate(742 this.Id, key, value));743 this.SendEvent(client, new ResponseToUpdate());744 this.SendEvent(this.Predecessor, new BackwardAck(nextSeqId));745 }746 }747 this.RaiseEvent(new Local());748 }749 [OnEntry(nameof(ProcessBckAckOnEntry))]750 [OnEventGotoState(typeof(Local), typeof(WaitForRequest))]751 private class ProcessBckAck : State752 {753 }754 private void ProcessBckAckOnEntry(Event e)755 {756 var nextSeqId = (e as BackwardAck).NextSeqId;757 this.RemoveItemFromSent(nextSeqId);758 if (!this.IsHead)759 {760 this.SendEvent(this.Predecessor, new BackwardAck(nextSeqId));761 }762 this.RaiseEvent(new Local());763 }764 private void RemoveItemFromSent(int seqId)765 {766 int removeIdx = -1;767 for (int i = this.SentHistory.Count - 1; i >= 0; i--)768 {769 if (seqId == this.SentHistory[i].NextSeqId)770 {771 removeIdx = i;772 }773 }774 if (removeIdx != -1)775 {776 this.SentHistory.RemoveAt(removeIdx);777 }778 }779 }780 private class Client : StateMachine781 {782 internal class SetupEvent : Event783 {784 public int Id;785 public ActorId HeadNode;786 public ActorId TailNode;787 public int Value;788 public SetupEvent(int id, ActorId head, ActorId tail, int val)789 : base()790 {791 this.Id = id;792 this.HeadNode = head;793 this.TailNode = tail;794 this.Value = val;795 }796 }797 internal class UpdateHeadTail : Event798 {799 public ActorId Head;800 public ActorId Tail;801 public UpdateHeadTail(ActorId head, ActorId tail)802 : base()803 {804 this.Head = head;805 this.Tail = tail;806 }807 }808 internal class Update : Event809 {810 public ActorId Client;811 public int Key;812 public int Value;813 public Update(ActorId client, int key, int value)814 : base()815 {816 this.Client = client;817 this.Key = key;818 this.Value = value;819 }820 }821 internal class Query : Event822 {823 public ActorId Client;824 public int Key;825 public Query(ActorId client, int key)826 : base()827 {828 this.Client = client;829 this.Key = key;830 }831 }832 private class Local : Event833 {834 }835 private class Done : Event836 {837 }838 private ActorId HeadNode;839 private ActorId TailNode;840 private int StartIn;841 private int Next;842 private Dictionary<int, int> KeyValueStore;843 [Start]844 [OnEntry(nameof(InitOnEntry))]845 [OnEventGotoState(typeof(Local), typeof(PumpUpdateRequests))]846 private class Init : State847 {848 }849 private void InitOnEntry(Event e)850 {851 this.HeadNode = (e as SetupEvent).HeadNode;852 this.TailNode = (e as SetupEvent).TailNode;853 this.StartIn = (e as SetupEvent).Value;854 this.Next = 1;855 this.KeyValueStore = new Dictionary<int, int>856 {857 { 1 * this.StartIn, 100 },858 { 2 * this.StartIn, 200 },859 { 3 * this.StartIn, 300 },860 { 4 * this.StartIn, 400 }861 };862 this.RaiseEvent(new Local());863 }864 [OnEntry(nameof(PumpUpdateRequestsOnEntry))]865 [OnEventGotoState(typeof(Local), typeof(PumpUpdateRequests), nameof(PumpRequestsLocalAction))]866 [OnEventGotoState(typeof(Done), typeof(PumpQueryRequests), nameof(PumpRequestsDoneAction))]867 [IgnoreEvents(typeof(ChainReplicationServer.ResponseToUpdate), typeof(ChainReplicationServer.ResponseToQuery))]868 private class PumpUpdateRequests : State869 {870 }871 private void PumpUpdateRequestsOnEntry()872 {873 this.SendEvent(this.HeadNode, new Update(this.Id, this.Next * this.StartIn,874 this.KeyValueStore[this.Next * this.StartIn]));875 if (this.Next >= 3)876 {877 this.RaiseEvent(new Done());878 }879 else880 {881 this.RaiseEvent(new Local());882 }883 }884 [OnEntry(nameof(PumpQueryRequestsOnEntry))]885 [OnEventGotoState(typeof(Local), typeof(PumpQueryRequests), nameof(PumpRequestsLocalAction))]886 [IgnoreEvents(typeof(ChainReplicationServer.ResponseToUpdate), typeof(ChainReplicationServer.ResponseToQuery))]887 private class PumpQueryRequests : State888 {889 }890 private void PumpQueryRequestsOnEntry()891 {892 this.SendEvent(this.TailNode, new Query(this.Id, this.Next * this.StartIn));893 if (this.Next >= 3)894 {895 this.RaiseHaltEvent();896 }897 else898 {899 this.RaiseEvent(new Local());900 }901 }902 private void PumpRequestsLocalAction()903 {904 this.Next++;905 }906 private void PumpRequestsDoneAction()907 {908 this.Next = 1;909 }910 }911 private class InvariantMonitor : Monitor912 {913 internal class SetupEvent : Event914 {915 public List<ActorId> Servers;916 public SetupEvent(List<ActorId> servers)917 : base()918 {919 this.Servers = servers;920 }921 }922 internal class UpdateServers : Event923 {924 public List<ActorId> Servers;925 public UpdateServers(List<ActorId> servers)926 : base()927 {928 this.Servers = servers;929 }930 }931 internal class HistoryUpdate : Event932 {933 public ActorId Server;934 public List<int> History;935 public HistoryUpdate(ActorId server, List<int> history)936 : base()937 {938 this.Server = server;939 this.History = history;940 }941 }942 internal class SentUpdate : Event943 {944 public ActorId Server;945 public List<SentLog> SentHistory;946 public SentUpdate(ActorId server, List<SentLog> sentHistory)947 : base()948 {949 this.Server = server;950 this.SentHistory = sentHistory;951 }952 }953 private class Local : Event954 {955 }956 private List<ActorId> Servers;957 private Dictionary<ActorId, List<int>> History;958 private Dictionary<ActorId, List<int>> SentHistory;959 private List<int> TempSeq;960 private ActorId Next;961 private ActorId Prev;962 [Start]963 [OnEventGotoState(typeof(Local), typeof(WaitForUpdateMessage))]964 [OnEventDoAction(typeof(SetupEvent), nameof(Setup))]965 private class Init : State966 {967 }968 private void Setup(Event e)969 {970 this.Servers = (e as SetupEvent).Servers;971 this.History = new Dictionary<ActorId, List<int>>();972 this.SentHistory = new Dictionary<ActorId, List<int>>();973 this.TempSeq = new List<int>();974 this.RaiseEvent(new Local());975 }976 [OnEventDoAction(typeof(HistoryUpdate), nameof(CheckUpdatePropagationInvariant))]977 [OnEventDoAction(typeof(SentUpdate), nameof(CheckInprocessRequestsInvariant))]978 [OnEventDoAction(typeof(UpdateServers), nameof(ProcessUpdateServers))]979 private class WaitForUpdateMessage : State980 {981 }982 private void CheckUpdatePropagationInvariant(Event e)983 {984 var server = (e as HistoryUpdate).Server;985 var history = (e as HistoryUpdate).History;986 this.IsSorted(history);987 if (this.History.ContainsKey(server))988 {989 this.History[server] = history;990 }991 else992 {993 this.History.Add(server, history);994 }995 // HIST(i+1) <= HIST(i)996 this.GetNext(server);997 if (this.Next != null && this.History.ContainsKey(this.Next))998 {999 this.CheckLessOrEqualThan(this.History[this.Next], this.History[server]);1000 }1001 // HIST(i) <= HIST(i-1)1002 this.GetPrev(server);1003 if (this.Prev != null && this.History.ContainsKey(this.Prev))1004 {1005 this.CheckLessOrEqualThan(this.History[server], this.History[this.Prev]);1006 }1007 }1008 private void CheckInprocessRequestsInvariant(Event e)1009 {1010 this.ClearTempSeq();1011 var server = (e as SentUpdate).Server;1012 var sentHistory = (e as SentUpdate).SentHistory;1013 this.ExtractSeqId(sentHistory);1014 if (this.SentHistory.ContainsKey(server))1015 {1016 this.SentHistory[server] = this.TempSeq;1017 }1018 else1019 {1020 this.SentHistory.Add(server, this.TempSeq);1021 }1022 this.ClearTempSeq();1023 // HIST(i) == HIST(i+1) + SENT(i)1024 this.GetNext(server);1025 if (this.Next != null && this.History.ContainsKey(this.Next))1026 {1027 this.MergeSeq(this.History[this.Next], this.SentHistory[server]);1028 this.CheckEqual(this.History[server], this.TempSeq);1029 }1030 this.ClearTempSeq();1031 // HIST(i-1) == HIST(i) + SENT(i-1)1032 this.GetPrev(server);1033 if (this.Prev != null && this.History.ContainsKey(this.Prev))1034 {1035 this.MergeSeq(this.History[server], this.SentHistory[this.Prev]);1036 this.CheckEqual(this.History[this.Prev], this.TempSeq);1037 }1038 this.ClearTempSeq();1039 }1040 private void GetNext(ActorId curr)1041 {1042 this.Next = null;1043 for (int i = 1; i < this.Servers.Count; i++)1044 {1045 if (this.Servers[i - 1].Equals(curr))1046 {1047 this.Next = this.Servers[i];1048 }1049 }1050 }1051 private void GetPrev(ActorId curr)1052 {1053 this.Prev = null;1054 for (int i = 1; i < this.Servers.Count; i++)1055 {1056 if (this.Servers[i].Equals(curr))1057 {1058 this.Prev = this.Servers[i - 1];1059 }1060 }1061 }1062 private void ExtractSeqId(List<SentLog> seq)1063 {1064 this.ClearTempSeq();1065 for (int i = seq.Count - 1; i >= 0; i--)1066 {1067 if (this.TempSeq.Count > 0)1068 {1069 this.TempSeq.Insert(0, seq[i].NextSeqId);1070 }1071 else1072 {1073 this.TempSeq.Add(seq[i].NextSeqId);1074 }1075 }1076 this.IsSorted(this.TempSeq);1077 }1078 private void MergeSeq(List<int> seq1, List<int> seq2)1079 {1080 this.ClearTempSeq();1081 this.IsSorted(seq1);1082 if (seq1.Count is 0)1083 {1084 this.TempSeq = seq2;1085 }1086 else if (seq2.Count is 0)1087 {1088 this.TempSeq = seq1;1089 }1090 else1091 {1092 for (int i = 0; i < seq1.Count; i++)1093 {1094 if (seq1[i] < seq2[0])1095 {1096 this.TempSeq.Add(seq1[i]);1097 }1098 }1099 for (int i = 0; i < seq2.Count; i++)1100 {1101 this.TempSeq.Add(seq2[i]);1102 }1103 }1104 this.IsSorted(this.TempSeq);1105 }1106 private void IsSorted(List<int> seq)1107 {1108 for (int i = 0; i < seq.Count - 1; i++)1109 {1110 this.Assert(seq[i] < seq[i + 1], "Sequence is not sorted.");1111 }1112 }1113 private void CheckLessOrEqualThan(List<int> seq1, List<int> seq2)1114 {1115 this.IsSorted(seq1);1116 this.IsSorted(seq2);1117 for (int i = 0; i < seq1.Count; i++)1118 {1119 if ((i == seq1.Count) || (i == seq2.Count))1120 {1121 break;1122 }1123 this.Assert(seq1[i] <= seq2[i], "{0} not less or equal than {1}.", seq1[i], seq2[i]);1124 }1125 }1126 private void CheckEqual(List<int> seq1, List<int> seq2)1127 {1128 this.IsSorted(seq1);1129 this.IsSorted(seq2);1130 for (int i = 0; i < seq1.Count; i++)1131 {1132 if ((i == seq1.Count) || (i == seq2.Count))1133 {1134 break;1135 }1136 this.Assert(seq1[i] == seq2[i], "{0} not equal with {1}.", seq1[i], seq2[i]);1137 }1138 }1139 private void ClearTempSeq()1140 {1141 this.Assert(this.TempSeq.Count <= 6, "Temp sequence has more than 6 elements.");1142 this.TempSeq.Clear();1143 this.Assert(this.TempSeq.Count is 0, "Temp sequence is not cleared.");1144 }1145 private void ProcessUpdateServers(Event e)1146 {1147 this.Servers = (e as UpdateServers).Servers;1148 }1149 }1150 private class ServerResponseSeqMonitor : Monitor1151 {1152 internal class SetupEvent : Event1153 {1154 public List<ActorId> Servers;1155 public SetupEvent(List<ActorId> servers)1156 : base()1157 {1158 this.Servers = servers;1159 }1160 }1161 internal class UpdateServers : Event1162 {1163 public List<ActorId> Servers;1164 public UpdateServers(List<ActorId> servers)1165 : base()1166 {1167 this.Servers = servers;1168 }1169 }1170 internal class ResponseToUpdate : Event1171 {1172 public ActorId Tail;1173 public int Key;1174 public int Value;1175 public ResponseToUpdate(ActorId tail, int key, int val)1176 : base()1177 {1178 this.Tail = tail;1179 this.Key = key;1180 this.Value = val;1181 }1182 }1183 internal class ResponseToQuery : Event1184 {1185 public ActorId Tail;1186 public int Key;1187 public int Value;1188 public ResponseToQuery(ActorId tail, int key, int val)1189 : base()1190 {1191 this.Tail = tail;1192 this.Key = key;1193 this.Value = val;1194 }1195 }1196 private class Local : Event1197 {1198 }1199 private List<ActorId> Servers;1200 private Dictionary<int, int> LastUpdateResponse;1201 [Start]1202 [OnEventGotoState(typeof(Local), typeof(Wait))]1203 [OnEventDoAction(typeof(SetupEvent), nameof(Setup))]1204 private class Init : State1205 {1206 }1207 private void Setup(Event e)1208 {1209 this.Servers = (e as SetupEvent).Servers;1210 this.LastUpdateResponse = new Dictionary<int, int>();1211 this.RaiseEvent(new Local());1212 }1213 [OnEventDoAction(typeof(ResponseToUpdate), nameof(ResponseToUpdateAction))]1214 [OnEventDoAction(typeof(ResponseToQuery), nameof(ResponseToQueryAction))]1215 [OnEventDoAction(typeof(UpdateServers), nameof(ProcessUpdateServers))]1216 private class Wait : State1217 {1218 }1219 private void ResponseToUpdateAction(Event e)1220 {1221 var tail = (e as ResponseToUpdate).Tail;1222 var key = (e as ResponseToUpdate).Key;1223 var value = (e as ResponseToUpdate).Value;...

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1using Microsoft.Coyote.Actors;2using Microsoft.Coyote.Actors.BugFinding;3using Microsoft.Coyote.Actors.BugFinding.Tests;4using System;5using System.Collections.Generic;6using System.Linq;7using System.Text;8using System.Threading.Tasks;9{10 {11 static void Main(string[] args)12 {13 var config = Configuration.Create();14 config.SetBugFindingStrategy(BugFindingStrategy.Exploration);15 config.SetMaxSchedulingSteps(100);16 config.SetMaxFairSchedulingSteps(100);17 config.SetMaxStepsFromBug(100);18 config.SetMaxFairStepsFromBug(100);19 config.SetVerbosity(1);20 config.SetRandomSchedulingSeed(1);21 using (var runtime = RuntimeFactory.Create(config))22 {23 runtime.CreateActor(typeof(UpdateHeadTail), new UpdateHeadTail.SetupEvent());24 }25 }26 }27}

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1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using Microsoft.Coyote.Actors;7using Microsoft.Coyote.Actors.BugFinding.Tests;8using Microsoft.Coyote.Actors.BugFinding;9using Microsoft.Coyote.Actors.BugFinding.Strategies;10{11 {12 static void Main(string[] args)13 {14 var configuration = BugFindingEngine.CreateDefaultBugFindingConfiguration();15 configuration.Strategy = BugFindingStrategy.RandomExecution;16 configuration.SchedulingIterations = 200;17 configuration.TestingIterations = 10;18 configuration.MaxFairSchedulingSteps = 100;19 configuration.MaxUnfairSchedulingSteps = 100;20 configuration.EnableDataRaceDetection = true;21 configuration.EnableDeadlockDetection = true;22 configuration.EnableLivelockDetection = true;23 configuration.EnableOperationInterleavings = true;24 configuration.EnableActorStatePrinting = true;25 configuration.EnableActorStateGraph = true;26 configuration.EnableStateGraphScheduling = true;27 configuration.EnableStateGraphSchedulingWithFairScheduling = true;28 configuration.EnableStateGraphSchedulingWithFairSchedulingAndFairLiveness = true;29 configuration.EnableStateGraphSchedulingWithFairSchedulingAndFairLivenessWithFairTermination = true;30 configuration.EnableStateGraphSchedulingWithFairSchedulingAndFairLivenessWithFairTerminationAndFairNondeterminism = true;31 configuration.EnableStateGraphSchedulingWithFairSchedulingAndFairLivenessWithFairTerminationAndFairNondeterminismAndFairChoice = true;32 configuration.EnableStateGraphSchedulingWithFairSchedulingAndFairLivenessWithFairTerminationAndFairNondeterminismAndFairChoiceAndFairEnqueue = true;33 configuration.EnableStateGraphSchedulingWithFairSchedulingAndFairLivenessWithFairTerminationAndFairNondeterminismAndFairChoiceAndFairEnqueueAndFairDequeue = true;34 configuration.EnableStateGraphSchedulingWithFairSchedulingAndFairLivenessWithFairTerminationAndFairNondeterminismAndFairChoiceAndFairEnqueueAndFairDequeueAndFairWait = true;35 configuration.EnableStateGraphSchedulingWithFairSchedulingAndFairLivenessWithFairTerminationAndFairNondeterminismAndFairChoiceAndFairEnqueueAndFairDequeueAndFairWaitAndFairSend = true;

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1using Microsoft.Coyote;2using Microsoft.Coyote.Actors;3using Microsoft.Coyote.Actors.BugFinding.Tests;4using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail;5using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Events;6using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machines;7using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Models;8using Microsoft.Coyote.TestingServices;9using System;10using System.Threading.Tasks;11{12 {13 static async Task Main(string[] args)14 {15 Configuration configuration = Configuration.Create();16 configuration.UseTestingEngine();17 configuration.UseBugFindingStrategy(18 BugFindingStrategyKind.UpdateHeadTail);19 configuration.SchedulingIterations = 10;20 configuration.SchedulingSeed = 0;21 configuration.SchedulingMaxSteps = 100;22 configuration.SchedulingMaxFairSchedules = 100;23 configuration.SchedulingVerbosity = 3;24 configuration.Verbose = 3;25 configuration.LivenessTemperatureThreshold = 100;26 using (var runtime = RuntimeFactory.Create(configuration))27 {28 var test = new UpdateHeadTailTest(runtime);29 await test.RunAsync();30 }31 }32 }33}34using Microsoft.Coyote;35using Microsoft.Coyote.Actors;36using Microsoft.Coyote.Actors.BugFinding.Tests;37using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail;38using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Events;39using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machines;40using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Models;41using Microsoft.Coyote.TestingServices;42using System;43using System.Threading.Tasks;44{45 {46 static async Task Main(string[] args)47 {48 Configuration configuration = Configuration.Create();49 configuration.UseTestingEngine();50 configuration.UseBugFindingStrategy(51 BugFindingStrategyKind.UpdateHeadTail);

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1using Microsoft.Coyote;2using Microsoft.Coyote.Actors;3using Microsoft.Coyote.Actors.BugFinding.Tests;4using Microsoft.Coyote.TestingServices;5using Microsoft.Coyote.TestingServices.SchedulingStrategies;6using System;7using System.Threading.Tasks;8{9 {10 public static async Task Main(string[] args)11 {12 var configuration = Configuration.Create();13 configuration.SchedulingStrategy = new RandomStrategy();14 configuration.SchedulingIterations = 100;15 configuration.Verbose = 1;16 configuration.TestingIterations = 1000;17 configuration.MaxFairSchedulingSteps = 1000;18 configuration.SuppressTrace = true;19 configuration.LogWriter = new LogWriter();20 var runtime = TestingEngineFactory.CreateBugFindingEngine(configuration);21 await runtime.RunAsync(new SystematicTestingSchedulingPolicy(), new SetupEvent());22 }23 }24}

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1using Microsoft.Coyote.Actors;2using Microsoft.Coyote.Actors.BugFinding.Tests;3using System;4using System.Collections.Generic;5using System.Linq;6using System.Text;7using System.Threading.Tasks;8{9 {10 static void Main(string[] args)11 {12 var runtime = RuntimeFactory.Create();13 runtime.CreateActor(typeof(UpdateHeadTail), new Event());14 runtime.Run();15 }16 }17}18using Microsoft.Coyote.Actors;19using Microsoft.Coyote.Actors.BugFinding.Tests;20using System;21using System.Collections.Generic;22using System.Linq;23using System.Text;24using System.Threading.Tasks;25{26 {27 static void Main(string[] args)28 {29 var runtime = RuntimeFactory.Create();30 runtime.CreateActor(typeof(UpdateHeadTail), new Event());31 runtime.Run();32 }33 }34}35using Microsoft.Coyote.Actors;36using Microsoft.Coyote.Actors.BugFinding.Tests;37using System;38using System.Collections.Generic;39using System.Linq;40using System.Text;41using System.Threading.Tasks;42{43 {44 static void Main(string[] args)45 {46 var runtime = RuntimeFactory.Create();47 runtime.CreateActor(typeof(UpdateHeadTail), new Event());48 runtime.Run();49 }50 }51}52using Microsoft.Coyote.Actors;53using Microsoft.Coyote.Actors.BugFinding.Tests;54using System;55using System.Collections.Generic;56using System.Linq;57using System.Text;58using System.Threading.Tasks;59{60 {61 static void Main(string[] args)62 {63 var runtime = RuntimeFactory.Create();64 runtime.CreateActor(typeof(UpdateHeadTail), new Event());65 runtime.Run();66 }67 }68}

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1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using Microsoft.Coyote.Actors;7using Microsoft.Coyote.Actors.BugFinding.Tests;8{9 {10 static void Main(string[] args)11 {12 var config = Configuration.Create();13 config.UseEventQueue = true;14 config.MaxSchedulingSteps = 1000;

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1using Microsoft.Coyote.Actors.BugFinding.Tests;2using Microsoft.Coyote.Actors;3using System;4using System.Collections.Generic;5using System.Linq;6using System.Text;7using System.Threading.Tasks;8using Microsoft.Coyote;9using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail;10using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Events;11using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machines;12using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.States;13{14 {15 public static void Main(string[] args)16 {17 ActorRuntime.Setup();18 var runtime = ActorRuntime.Create();19 var config = Configuration.Create();20 config.MaxSchedulingSteps = 1000;21 config.MaxFairSchedulingSteps = 1000;22 config.MaxUnfairSchedulingSteps = 1000;23 config.ThrowOnFailure = true;24 runtime.TestAsync(config, async () =>25 {26 var head = ActorId.CreateActor(typeof(Head));27 var tail = ActorId.CreateActor(typeof(Tail));28 await runtime.CreateActorAndExecuteAsync(typeof(UpdateHeadTail), head, tail);29 }).Wait();30 }31 }32}33using Microsoft.Coyote.Actors.BugFinding.Tests;34using Microsoft.Coyote.Actors;35using System;36using System.Collections.Generic;37using System.Linq;38using System.Text;39using System.Threading.Tasks;40using Microsoft.Coyote;41using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail;42using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Events;43using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machines;44using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.States;45{46 {47 public static void Main(string[] args)48 {49 ActorRuntime.Setup();50 var runtime = ActorRuntime.Create();51 var config = Configuration.Create();52 config.MaxSchedulingSteps = 1000;53 config.MaxFairSchedulingSteps = 1000;

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1using Microsoft.Coyote.Actors.BugFinding.Tests;2using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail;3using System;4using System.Collections.Generic;5using System.Text;6using System.Threading.Tasks;7using Microsoft.Coyote.Actors;8using Microsoft.Coyote.Actors.BugFinding;9using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail;10using Microsoft.Coyote.SystematicTesting;

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1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using Microsoft.Coyote;7using Microsoft.Coyote.Actors;8using Microsoft.Coyote.Actors.BugFinding.Tests;9using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail;10using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.UpdateHeadTailActor;11using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.UpdateHeadTailActor.UpdateHeadTailActor;12using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.UpdateHeadTailActor.UpdateHeadTailActor.UpdateHeadTailActor;13using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.UpdateHeadTailActor.UpdateHeadTailActor.UpdateHeadTailActor.UpdateHeadTailActor;14using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.UpdateHeadTailActor.UpdateHeadTailActor.UpdateHeadTailActor.UpdateHeadTailActor.UpdateHeadTailActor;15using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.UpdateHeadTailActor.UpdateHeadTailActor.UpdateHeadTailActor.UpdateHeadTailActor.UpdateHeadTailActor.UpdateHeadTailActor;16using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.UpdateHeadTailActor.UpdateHeadTailActor.UpdateHeadTailActor.UpdateHeadTailActor.UpdateHeadTailActor.UpdateHeadTailActor.UpdateHeadTailActor;17using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.UpdateHeadTailActor.UpdateHeadTailActor.UpdateHeadTailActor.UpdateHeadTailActor.UpdateHeadTailActor.UpdateHeadTailActor.UpdateHeadTailActor.UpdateHeadTailActor;

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