def solve(self):
queue = Priorityqueue([self.initial])
i = 0
maxheapsize = 1
h = 1
path = []
found = False
a,b,c,d = -1,-1,-1,-1
while len(queue.heap) > 1:
if len(self.visited) > 1000000:
print "No. of Iterations crossed 10,00,000. Exiting.."
sys.exit()
curr = queue.popmax()
if GlobalVariable.debug:
print "iter = {0}, queue = {1}, heur = {2}, depth = {3}".format(i,len(queue.heap), curr.heur, curr.depth)
i += 1
h -= 1
if curr.isgoalstate():
path = curr.tracebacks()
path.append(curr)
a,b,c,d = i, len(path), maxheapsize, len(self.visited)
found = True
if GlobalVariable.debug:
k = 1
print " Solution: In Place Blocks Heuristic "
for x in path:
print "________________STATE {0}______________________".format(str(k))
for stack in x.vertex.stacks:
print "{0}".format(str(stack))
k += 1
print "Iterations: %d" % (i)
print "Path Length: %d" % len(path)
print "Maximum queue size: %d" % (maxheapsize)
print "Number of states visited: %d" % (len(self.visited))
return i, len(path), maxheapsize, len(self.visited), path
for x in curr.successors():
if not self.visited.has_key(x.vertex.gethash()):
self.visited[x.vertex.gethash()] = x.depth
queue.insert(x)
h += 1
elif self.visited[x.vertex.gethash()] > x.depth:
del self.visited[x.vertex.gethash()]
self.visited[x.vertex.gethash()] = x.depth
queue.insert(x)
if h > maxheapsize:
maxheapsize = h
#sprint i, maxheapsize, len(self.visited)
if GlobalVariable.prun:
if len(queue.heap) > 1000:
del queue.heap[100:]
print "Iterations: %d" % (a+1)
print "Path Length: %d" % b
print "Maximum queue size: %d" % c
print "Number of states visited: %d" % d
return a, b, c, d, path
def __init__(self, strPathToInputFile):
self.strPathToinputFile = strPathToInputFile
self.clauses = Clauses(strPathToInputFile)
self.clauses.parse()
self.candidates = Priorityqueue(self.clauses)
self.heapDict = {}
class Solver:
def __init__(self, strPathToInputFile):
self.strPathToinputFile = strPathToInputFile
self.clauses = Clauses(strPathToInputFile)
self.clauses.parse()
self.candidates = Priorityqueue(self.clauses)
self.heapDict = {}
def getInitialCandidates(self):
for i in range(self.clauses.lastClauseID + 1):
for j in range(i+1,self.clauses.lastClauseID + 1):
if i != j and self.clauses.isResovable(i,j):
self.candidates.insert([i,j])
def solveByResolution(self):
self.getInitialCandidates()
iter = 1
maxquesize = 0
while (len(self.candidates.heap) > 1):
if len(self.candidates.heap)-1 > maxquesize:
maxquesize = len(self.candidates.heap) -1
pairToBeResolved = self.candidates.popmax()
listOfResolvent = self.clauses.resolvePair(pairToBeResolved)
if Global.debug:
print "Iteration {0}, queue size {1}, resolution on {2} and {3}".format(iter, len(self.candidates.heap), pairToBeResolved[0], pairToBeResolved[1])
print "Resolving {0} and {1}".format(self.clauses.toString(self.clauses.clauses[pairToBeResolved[0]].value), self.clauses.toString(self.clauses.clauses[pairToBeResolved[1]].value))
for resolvent in listOfResolvent:
self.clauses.addClause(resolvent,pairToBeResolved) #Add clause takes care of duplicate clauses
if len(resolvent) == 0:
print "Maximum Queue size: {0}".format(maxquesize)
return True
for i in range(self.clauses.lastClauseID):
if self.clauses.isResovable(i, self.clauses.lastClauseID):
listOfResolvent = self.clauses.resolvePair([i,self.clauses.lastClauseID])
for resolvent in listOfResolvent:
key = str(i) + "," + str(self.clauses.lastClauseID)
if not (self.clauses.candidateDict.has_key(''.join(resolvent)) and self.heapDict.has_key(key)):
if not self.heapDict.has_key(key):
self.candidates.insert([i, self.clauses.lastClauseID])
self.heapDict[key] = True #Todo
iter += 1
print "Maximum queue size {0}".format(maxquesize)
return False
def printResult(self,id):
self.printPattern(id,0)
def printPattern(self,id,depth):
clause = self.clauses.clauses[id].value
strClause = self.clauses.toString(clause)
parent= ""
if self.clauses.clauses[id].parentOne == -1:
parent = "[input]"
else:
parent = "{0}".format([self.clauses.clauses[id].parentOne, self.clauses.clauses[id].parentTwo])
if strClause == "":
strClause = "[]"
for i in range(depth):
print " ",
print "{0}: {1} {2}".format(id, strClause, parent)
if self.clauses.clauses[id].parentOne == -1:
return
self.printPattern(self.clauses.clauses[id].parentOne, depth + 1)
self.printPattern(self.clauses.clauses[id].parentTwo, depth + 1)
return
