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

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

ChainReplicationTests.cs

Source:ChainReplicationTests.cs Github

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...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;1224 if (this.Servers.Contains(tail))1225 {1226 if (this.LastUpdateResponse.ContainsKey(key))1227 {1228 this.LastUpdateResponse[key] = value;1229 }1230 else1231 {1232 this.LastUpdateResponse.Add(key, value);1233 }1234 }1235 }1236 private void ResponseToQueryAction(Event e)1237 {1238 var tail = (e as ResponseToQuery).Tail;1239 var key = (e as ResponseToQuery).Key;1240 var value = (e as ResponseToQuery).Value;1241 if (this.Servers.Contains(tail))1242 {1243 this.Assert(value == this.LastUpdateResponse[key], "Value {0} is not " +1244 "equal to {1}", value, this.LastUpdateResponse[key]);1245 }1246 }1247 private void ProcessUpdateServers(Event e)1248 {1249 this.Servers = (e as UpdateServers).Servers;1250 }1251 }1252 [Theory(Timeout = 10000)]1253 [InlineData(323)]1254 public void TestSequenceNotSortedInChainReplicationProtocol(uint seed)1255 {1256 this.TestWithError(r =>1257 {1258 r.RegisterMonitor<InvariantMonitor>();1259 r.RegisterMonitor<ServerResponseSeqMonitor>();1260 r.CreateActor(typeof(Environment));1261 },1262 configuration: this.GetConfiguration()1263 .WithPrioritizationStrategy(true, 1)...

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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;9{10 {11 static void Main(string[] args)12 {13 var runtime = RuntimeFactory.Create();14 runtime.CreateActor(typeof(UpdateHeadTail));15 runtime.Wait();16 }17 }18}19public async Task Update()20{21 this.Runtime.Wait();22 this.Runtime.SendEvent(this.Id, new E());23}24public async Task Update()25{26 this.Runtime.Wait();27 this.Runtime.SendEvent(this.Id, new E());28}29using System;30using System.Collections.Generic;31using System.Linq;

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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;10using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail;11using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine1;12using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine2;13using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine3;14using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine4;15using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine5;16using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine6;17using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine7;18using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine8;19using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine9;20using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine10;21using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine11;22using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine12;23using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine13;24using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine14;25using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine15;26using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine16;27using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine17;28using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine18;29using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine19;30using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine20;31using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine21;32using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine22;33using Microsoft.Coyote.Actors.BugFinding.Tests.UpdateHeadTail.Machine23;

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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.Specifications;9using Microsoft.Coyote.SystematicTesting;10using Microsoft.Coyote.Tasks;11{12 {13 static void Main(string[] args)14 {15 var configuration = Configuration.Create();16 configuration.MaxSchedulingSteps = 100000;17 configuration.SchedulingIterations = 100;18 configuration.Verbose = 3;19 configuration.TestingEngine = TestingEngine.InProcess;20 var test = new UpdateHeadTail();21 var result = SystematicTestEngine.Execute(configuration, test);22 Console.WriteLine($"Number of bugs found: {result.NumOfBugsFound}");23 }24 }25}26var configuration = Configuration.Create();27configuration.MaxSchedulingSteps = 100000;28configuration.SchedulingIterations = 100;29configuration.Verbose = 3;30configuration.TestingEngine = TestingEngine.InProcess;31var test = new UpdateHeadTail();32var result = SystematicTestEngine.Execute(configuration, test);33Console.WriteLine($"Number of bugs found: {result.NumOfBugsFound}");34var configuration = Configuration.Create();35configuration.MaxSchedulingSteps = 100000;36configuration.SchedulingIterations = 100;37configuration.Verbose = 3;38configuration.TestingEngine = TestingEngine.InProcess;39configuration.MaxUnfairSchedulingSteps = 100000;40var configuration = Configuration.Create();41configuration.MaxSchedulingSteps = 100000;

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1using System;2using System.Threading.Tasks;3using Microsoft.Coyote;4using Microsoft.Coyote.Actors;5using Microsoft.Coyote.Actors.BugFinding.Tests;6{7 {8 static void Main(string[] args)9 {10 CoyoteRuntime runtime = CoyoteRuntime.Create();11 var actor = runtime.CreateActor(typeof(UpdateHeadTail));12 runtime.SendEvent(actor, new UpdateEvent(1, 2));13 }14 }15}16using System;17using System.Threading.Tasks;18using Microsoft.Coyote;19using Microsoft.Coyote.Actors;20using Microsoft.Coyote.Actors.BugFinding.Tests;21{22 {23 static void Main(string[] args)24 {25 CoyoteRuntime runtime = CoyoteRuntime.Create();26 var actor = runtime.CreateActor(typeof(UpdateHeadTail));27 runtime.SendEvent(actor, new UpdateEvent(2, 1));28 }29 }30}31using System;32using System.Threading.Tasks;33using Microsoft.Coyote;34using Microsoft.Coyote.Actors;35using Microsoft.Coyote.Actors.BugFinding.Tests;36{37 {38 static void Main(string[] args)39 {40 CoyoteRuntime runtime = CoyoteRuntime.Create();41 var actor = runtime.CreateActor(typeof(UpdateHeadTail));42 runtime.SendEvent(actor, new UpdateEvent(1, 1));43 }44 }45}46using System;47using System.Threading.Tasks;48using Microsoft.Coyote;49using Microsoft.Coyote.Actors;50using Microsoft.Coyote.Actors.BugFinding.Tests;51{52 {53 static void Main(string[] args)54 {55 CoyoteRuntime runtime = CoyoteRuntime.Create();56 var actor = runtime.CreateActor(typeof(UpdateHeadTail));57 runtime.SendEvent(actor, new UpdateEvent(0, 0));58 }59 }60}

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1using System;2using Microsoft.Coyote.Actors;3using Microsoft.Coyote.Actors.BugFinding.Tests;4{5 {6 static void Main(string[] args)7 {8 var runtime = RuntimeFactory.Create();9 runtime.CreateActor(typeof(UpdateHeadTail));10 Console.ReadLine();11 }12 }13}

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1using Microsoft.Coyote.Actors.BugFinding.Tests;2using System;3using System.Threading.Tasks;4{5 {6 static async Task Main(string[] args)7 {8 UpdateHeadTail test = new UpdateHeadTail();9 await test.Update();10 Console.WriteLine("Hello World!");11 }12 }13}

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1using Microsoft.Coyote.Actors;2using Microsoft.Coyote.Actors.BugFinding.Tests;3using Microsoft.Coyote.TestingServices;4using System;5using System.Threading.Tasks;6{7 {8 static void Main(string[] args)9 {10 var runtime = TestingEngineFactory.CreateBugFindingRuntime();11 var head = runtime.CreateActor(typeof(UpdateHeadTail));12 runtime.SendEvent(head, new UpdateHeadTail.Update(1));13 runtime.SendEvent(head, new UpdateHeadTail.Update(2));14 runtime.SendEvent(head, new UpdateHeadTail.Update(3));15 runtime.SendEvent(head, new UpdateHeadTail.Update(4));16 runtime.SendEvent(head, new UpdateHeadTail.Update(5));17 runtime.SendEvent(head, new UpdateHeadTail.Update(6));18 runtime.SendEvent(head, new UpdateHeadTail.Update(7));19 runtime.SendEvent(head, new UpdateHeadTail.Update(8));20 runtime.SendEvent(head, new UpdateHeadTail.Update(9));21 runtime.SendEvent(head, new UpdateHeadTail.Update(10));22 runtime.SendEvent(head, new UpdateHeadTail.Update(11));23 runtime.SendEvent(head, new UpdateHeadTail.Update(12));24 runtime.SendEvent(head, new UpdateHeadTail.Update(13));25 runtime.SendEvent(head, new UpdateHeadTail.Update(14));26 runtime.SendEvent(head, new UpdateHeadTail.Update(15));27 runtime.SendEvent(head, new UpdateHeadTail.Update(16));28 runtime.SendEvent(head, new UpdateHeadTail.Update(17));29 runtime.SendEvent(head, new UpdateHeadTail.Update(18));30 runtime.SendEvent(head, new UpdateHeadTail.Update(19));31 runtime.SendEvent(head, new UpdateHeadTail.Update(20));32 runtime.SendEvent(head, new UpdateHeadTail.Update(21));33 runtime.SendEvent(head, new UpdateHeadTail.Update(22));34 runtime.SendEvent(head, new UpdateHeadTail.Update(23));35 runtime.SendEvent(head, new UpdateHeadTail.Update(24));36 runtime.SendEvent(head, new UpdateHeadTail.Update(25));37 runtime.SendEvent(head, new UpdateHeadTail.Update(26));38 runtime.SendEvent(head, new UpdateHeadTail.Update(27));39 runtime.SendEvent(head, new UpdateHeadTail.Update(28));40 runtime.SendEvent(head, new UpdateHeadTail.Update(29));41 runtime.SendEvent(head, new

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

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1using System;2using System.Threading.Tasks;3using Microsoft.Coyote.Actors;4{5 {6 private class Start : Event { }7 private class Done : Event { }8 private class Update : Event { }9 private ActorId Head;10 private ActorId Tail;11 [OnEventDoAction(typeof(Start), nameof(Init))]12 private class InitState : State { }13 private void Init()14 {15 this.Head = this.CreateActor(typeof(Head));16 this.Tail = this.CreateActor(typeof(Tail));17 this.SendEvent(this.Head, new Head.Configure(this.Tail));18 this.SendEvent(this.Tail, new Tail.Configure(this.Head));19 this.SendEvent(this.Head, new Head.Update());20 this.SendEvent(this.Tail, new Tail.Update());21 }22 [OnEventDoAction(typeof(Update), nameof(UpdateHead))]23 private class UpdateHeadState : State { }24 private void UpdateHead()25 {26 this.SendEvent(this.Head, new Head.Update());27 }28 [OnEventDoAction(typeof(Update), nameof(UpdateTail))]29 private class UpdateTailState : State { }30 private void UpdateTail()31 {32 this.SendEvent(this.Tail, new Tail.Update());33 }34 [OnEventDoAction(typeof(Done), nameof(Done))]35 private class DoneState : State { }36 private void Done()37 {38 this.RaiseHaltEvent();39 }40 {41 {42 public ActorId Tail;43 public Configure(ActorId tail)44 {45 this.Tail = tail;46 }47 }48 private class Update : Event { }49 private ActorId Tail;50 [OnEventDoAction(typeof(Configure), nameof(Configure))]51 private class InitState : State { }52 private void Configure()53 {54 this.Tail = (this.ReceivedEvent as Configure).Tail;55 }56 [OnEventDoAction(typeof(Update), nameof(Update))]57 private class UpdateState : State { }58 private void Update()59 {60 this.SendEvent(this.Tail, new Tail.Update());61 this.RaiseEvent(new Update());62 }63 }64 {

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1using Microsoft.Coyote.Actors.BugFinding.Tests;2using System;3using System.Threading.Tasks;4{5 {6 static void Main(string[] args)7 {8 var obj = new UpdateHeadTail();9 obj.Update();10 }11 }12}13using Microsoft.Coyote.Actors.BugFinding.Tests;14using System;15using System.Threading.Tasks;16{17 {18 static void Main(string[] args)19 {20 var obj = new UpdateHeadTail();21 obj.Update();22 }23 }24}25using Microsoft.Coyote.Actors.BugFinding.Tests;26using System;27using System.Threading.Tasks;28{29 {30 static void Main(string[] args)31 {32 var obj = new UpdateHeadTail();33 obj.Update();34 }35 }36}37using Microsoft.Coyote.Actors.BugFinding.Tests;38using System;39using System.Threading.Tasks;40{41 {42 static void Main(string[] args)43 {44 var obj = new UpdateHeadTail();45 obj.Update();46 }47 }48}49using Microsoft.Coyote.Actors.BugFinding.Tests;50using System;51using System.Threading.Tasks;52{53 {54 static void Main(string[] args)55 {56 var obj = new UpdateHeadTail();57 obj.Update();58 }59 }60}

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