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175 lines
5.5 KiB
175 lines
5.5 KiB
#!/usr/bin/env python3
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import numpy as np
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from . import kSAT
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from tqdm import tqdm
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import math
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__VERTEX_WEIGHT__ = 1
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__EDGE_WEIGHT__ = -2
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def WMISdictQUBO(kSATInstance):
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quboInstance = {}
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for clauseIndex in range(kSATInstance.getNumberOfClauses()):
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clause = kSATInstance.getClause(clauseIndex)
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# build triangles
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for varIndexInClause in range(len(clause)):
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label = kSATInstance.getLableOfBinding(clauseIndex,
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clause[varIndexInClause])
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quboInstance[(label, label)] = __VERTEX_WEIGHT__
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for i in range(varIndexInClause + 1, len(clause)):
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targetLabel = kSATInstance.getLableOfBinding(clauseIndex,
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clause[i])
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quboInstance[(label, targetLabel)] = __EDGE_WEIGHT__
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# connect conflicts
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for conflict in kSATInstance.getConflicts():
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quboInstance[(conflict[0], conflict[1])] = __EDGE_WEIGHT__
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return quboInstance
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# only 3sat
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def primitiveQUBO(sat):
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quboInstance = {}
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chains = {}
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for clauseIndex in range(sat.getNumberOfClauses()):
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clause = sat.getClause(clauseIndex);
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#build clause primitives
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lit1 = "c{}_l{}".format(clauseIndex, clause[0])
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lit2 = "c{}_l{}".format(clauseIndex, clause[1])
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lit3 = "c{}_l{}".format(clauseIndex, clause[2])
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aux1 = "a{}_{}".format(clauseIndex, 1)
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aux2 = "a{}_{}".format(clauseIndex, 2)
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aux3 = "a{}_{}".format(clauseIndex, 3)
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aux4 = "a{}_{}".format(clauseIndex, 4)
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quboInstance[(lit1, lit1)] = 1;
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quboInstance[(lit2, lit2)] = 1;
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quboInstance[(lit3, lit3)] = 1;
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quboInstance[(aux1, aux1)] = -2;
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quboInstance[(aux2, aux2)] = 1;
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quboInstance[(aux3, aux3)] = -2;
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quboInstance[(aux4, aux4)] = -2;
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quboInstance[(lit1, lit2)] = 1;
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quboInstance[(lit1, aux1)] = -2;
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quboInstance[(lit2, aux1)] = -2;
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quboInstance[(aux1, aux2)] = -2;
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quboInstance[(aux2, aux3)] = -2;
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quboInstance[(aux2, lit3)] = 1;
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quboInstance[(lit3, aux3)] = -2;
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quboInstance[(aux3, aux4)] = -2;
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if clause[0] in chains:
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chains[clause[0]].append(lit1)
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else:
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chains[clause[0]] = [lit1]
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if clause[1] in chains:
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chains[clause[1]].append(lit2)
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else:
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chains[clause[1]] = [lit2]
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if clause[2] in chains:
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chains[clause[2]].append(lit3)
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else:
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chains[clause[2]] = [lit3]
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#build chains
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longestChain = 0;
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for lit, nodes in chains.items():
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if len(nodes) > longestChain:
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longestChain = len(nodes)
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if lit > 0 and -1 * lit in chains:
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quboInstance[(chains[lit][0], chains[-1*lit][0])] = 2
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print("longest chain = {}".format(longestChain))
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for nodes in chains.values():
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while len(nodes) > 1:
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quboInstance[(nodes[0], nodes[1])] = -2;
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nodes.pop(0)
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return quboInstance
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class QuboWriter:
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def __init__(self, qubo):
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self.__labelIndexDict = {}
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self.__qubo = qubo
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self.__initLabelIndexDict(self.__qubo)
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print(self.__labelIndexDict)
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def __initLabelIndexDict(self, qubo):
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indexCount = 0
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for coupler in qubo:
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label1 = coupler[0]
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label2 = coupler[1]
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if label1 not in self.__labelIndexDict:
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self.__labelIndexDict[label1] = indexCount
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indexCount += 1
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if label2 not in self.__labelIndexDict:
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self.__labelIndexDict[label2] = indexCount
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indexCount += 1
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def write(self, filePath):
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quboFile = open(filePath, "w")
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self.__writeQuboFileHeader(quboFile)
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self.__writeQuboFileNodes(quboFile)
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self.__writeQuboFileCouplers(quboFile)
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quboFile.close()
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def __writeQuboFileHeader(self, quboFile):
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numberOfNodes = len(self.__labelIndexDict)
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numberOfCouplers = len(self.__qubo) - numberOfNodes
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quboFile.write("c\n")
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quboFile.write("c this is a generated qubo file\n")
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quboFile.write("c\n")
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quboFile.write("p qubo 0 %d %d %d\n" %(numberOfNodes,
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numberOfNodes,
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numberOfCouplers))
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def __writeQuboFileNodes(self, quboFile):
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for label in self.__labelIndexDict:
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self.__writeCoupler(quboFile, (label, label))
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def __writeCoupler(self, quboFile, coupler):
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indices = self.__getNodeIndicesFromCoupler(coupler)
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quboFile.write("%d %d %d\n" % (indices[0],
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indices[1],
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self.__qubo[coupler]))
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def __getNodeIndicesFromCoupler(self, coupler):
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index1 = self.__labelIndexDict[coupler[0]]
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index2 = self.__labelIndexDict[coupler[1]]
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if index1 <= index2:
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return [index1, index2]
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else:
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return [index2, index1]
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def __writeQuboFileCouplers(self, quboFile):
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for coupler in self.__qubo:
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if coupler[0] != coupler[1]:
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self.__writeCoupler(quboFile, coupler)
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