private static int[][] GenerateOneStepFurtherExactly(IEnumerable <int[]> multipleTransitionFunctions, int newPosition, long targetCount, int precomputedIntegrityLevel, GeneratorHelper generatorHelper)
{
var automataToReturn = new int[targetCount][];
int pasteCounter = 0;
var hashSet = new ConcurrentDictionary <long, object>();
foreach (var oldTransitionFunction in multipleTransitionFunctions)
{
var verticesIncludingNew = newPosition + 1;
var temporary = new long[verticesIncludingNew];
var hashes = new long[verticesIncludingNew];
var mailbox = new List <long> [verticesIncludingNew];
for (int i = 0; i < mailbox.Length; i++)
{
mailbox[i] = new List <long>();
}
foreach (var newTransitionFunction in GenerateNewMutableLightweightFromSmart(oldTransitionFunction, newPosition))
{
generatorHelper.InitializeIteration(newTransitionFunction, hashes, mailbox);
var automatonHash = generatorHelper.IterateAndSquashMultiple(newTransitionFunction, hashes, temporary, mailbox, precomputedIntegrityLevel);
if (!hashSet.ContainsKey(automatonHash))
{
if (hashSet.TryAdd(automatonHash, null))
{
var index = Interlocked.Increment(ref pasteCounter);
automataToReturn[index - 1] = (int[])newTransitionFunction.Clone();
}
}
}
}
#if diagnostics
if (pasteCounter != automataToReturn.Length)
{
throw new Exception("Not enough automata produced!");
}
#endif
return(automataToReturn);
}
private static int[][] GenerateOneStepFurther(IEnumerable <int[]> multipleTransitionFunctions, int newPosition, long targetCount, ref int maximumEstimatedIntegrityLevel, GeneratorHelper generatorHelper)
{
var automataCandidates = multipleTransitionFunctions
.Select(transitionFunctions => GenerateNewMutableClonesFromSmart(transitionFunctions, newPosition))
.SelectMany(id => id)
.ToArray();
var individualVerticesHashes = new long[automataCandidates.Length][];
var verticesIncludingNew = newPosition + 1;
for (int automatonID = 0; automatonID < automataCandidates.Length; automatonID += 1)
{
individualVerticesHashes[automatonID] = new long[verticesIncludingNew];
}
#if diagnostics
Console.WriteLine($"Total number of automata: {automataCandidates.Length}");
#endif
var hashToGroup = new Dictionary <long, SameHashCollisionGroup>();
int estimatedIntegrityLevel = maximumEstimatedIntegrityLevel;
void insertIdIntoHashbag(Dictionary <long, SameHashCollisionGroup> map, long hash, int id)
{
if (!map.ContainsKey(hash))
{
map.TryAdd(hash, new SameHashCollisionGroup()
{
automatonIDs = new ConcurrentBag <int>(),
agreedIterations = estimatedIntegrityLevel
});
}
map[hash].automatonIDs.Add(id);
}
List <long>[] SetupNewMailbox(int size)
{
var mailbox = new List <long> [size];
for (int i = 0; i < mailbox.Length; i++)
{
mailbox[i] = new List <long>();
}
return(mailbox);
}
#if diagnostics
int progress = 0;
const int progressReportSize = 262143;
var last = (automataCandidates.Length / progressReportSize) * progressReportSize;
Console.WriteLine("Please wait...");
#endif
for (int automatonID = 0; automatonID < automataCandidates.Length; automatonID++)
{
var temporary = new long[verticesIncludingNew];
var mailbox = SetupNewMailbox(verticesIncludingNew);
#if diagnostics
if ((automatonID & progressReportSize) == 0 && automatonID > 0)
{
Interlocked.Add(ref progress, progressReportSize);
Console.WriteLine($"Preparing... {(progress) * 100d / automataCandidates.Length}%");
}
#endif
generatorHelper.InitializeIteration(automataCandidates[automatonID], individualVerticesHashes[automatonID], mailbox);
var initialHash = generatorHelper.IterateAndSquashMultiple(automataCandidates[automatonID], individualVerticesHashes[automatonID], temporary, mailbox, estimatedIntegrityLevel);
insertIdIntoHashbag(hashToGroup, initialHash, automatonID);
}
Dictionary <long, SameHashCollisionGroup> integrityLevelConformant = hashToGroup;
int requiredIntegrityLevel = maximumEstimatedIntegrityLevel;
while (targetCount > hashToGroup.Count)
{
#if diagnostics
Console.WriteLine($"Integrity level is too low: {requiredIntegrityLevel}");
#endif
requiredIntegrityLevel += 1;
integrityLevelConformant = new Dictionary <long, SameHashCollisionGroup>();
while (hashToGroup.Count > 0 && targetCount > hashToGroup.Count)
{
// pass groups that fulfil integrity level requirement
#if diagnostics
Console.WriteLine($"LEFTOVER to recompute: {hashToGroup.Count}");
#endif
var stack = new Stack <long>(hashToGroup.Keys);
while (stack.Count > 0)
{
var key = stack.Pop();
if (targetCount == hashToGroup.Count)
{
break;
}
var temporary = new long[verticesIncludingNew];
var mailbox = SetupNewMailbox(verticesIncludingNew);
var collisionGroup = hashToGroup[key];
var queuedHashes = new Queue <long>();
var differentHashes = new HashSet <long>();
// recompute hashes
foreach (var automatonID in collisionGroup.automatonIDs)
{
var nextHash = generatorHelper.IterateAndSquashMultiple(automataCandidates[automatonID], individualVerticesHashes[automatonID], temporary, mailbox, requiredIntegrityLevel - collisionGroup.agreedIterations);
differentHashes.Add(nextHash);
queuedHashes.Enqueue(nextHash);
}
if (differentHashes.Count == 1)
{
collisionGroup.agreedIterations = requiredIntegrityLevel;
hashToGroup.Remove(key, out collisionGroup);
integrityLevelConformant.TryAdd(key, collisionGroup);
}
else
{
hashToGroup.Remove(key, out collisionGroup);
foreach (var automatonID in collisionGroup.automatonIDs)
{
insertIdIntoHashbag(hashToGroup, queuedHashes.Dequeue(), automatonID);
}
foreach (var item in differentHashes)
{
stack.Push(item);
}
}
}
;
}
foreach (var kvp in hashToGroup)
{
integrityLevelConformant.TryAdd(kvp.Key, kvp.Value);
}
hashToGroup = integrityLevelConformant;
}
#if diagnostics
Console.WriteLine($"Integrity level is enough: {requiredIntegrityLevel}");
#endif
maximumEstimatedIntegrityLevel = requiredIntegrityLevel;
// return all unique automata
return(integrityLevelConformant.Select(kvp =>
{
kvp.Value.automatonIDs.TryPeek(out int representativeAutomatonID);
return automataCandidates[representativeAutomatonID];
}).ToArray());
}