def initialize(self):
(_, upper) = self.element.glCard
self.numInstances = upper.value
self.instances = SMTLib.SMT_IntVector(
self.element.uid,
self.numInstances,
bits=self.getBits(self.parentInstances + 1))
#gets the upper card bound of the parent clafer
if not self.parentStack:
self.parent = None
self.parentInstances = 1
else:
self.parent = self.parentStack[-1]
self.parentInstances = self.parent.numInstances
def addRefConstraints(self):
if not self.refSort:
return
elif isinstance(self.refSort,
PrimitiveType) and self.refSort.type == "real":
self.refs = SMTLib.SMT_RealVector(self.element.uid + "_ref",
self.numInstances)
elif isinstance(self.refSort, PrimitiveType):
self.refs = SMTLib.SMT_IntVector(self.element.uid + "_ref",
self.numInstances)
else:
self.refs = SMTLib.SMT_IntVector(
self.element.uid + "_ref",
self.numInstances,
bits=self.getBits(self.refSort.parentInstances + 1))
if not isinstance(self.refSort, PrimitiveType):
for i in range(self.numInstances):
#refs pointer is >= 0
self.constraints.addRefConstraint(
SMTLib.SMT_GE(self.refs[i], SMTLib.SMT_IntConst(0)))
#ref pointer is <= upper card of ref parent
self.constraints.addRefConstraint(
SMTLib.SMT_LE(
self.refs[i],
SMTLib.SMT_IntConst(self.refSort.numInstances)))
#if integer refs, zero out refs that do not have live parents,
#if clafer refs, set equal to ref.parentInstances if not live
#reference symmetry breaking
if not self.element.isAbstract:
for i in range(self.numInstances - 1):
for j in range(i + 1, self.numInstances):
if isinstance(self.refSort, PrimitiveType):
self.constraints.addRefConstraint(
SMTLib.SMT_Implies(
SMTLib.SMT_EQ(self.instances[i],
self.instances[j]),
SMTLib.SMT_LE(self.refs[i], self.refs[j])))
else:
self.constraints.addRefConstraint(
SMTLib.SMT_Implies(
mAnd(
SMTLib.SMT_NE(
self.refs[i],
SMTLib.SMT_IntConst(
self.refSort.numInstances)),
SMTLib.SMT_EQ(self.instances[i],
self.instances[j])),
SMTLib.SMT_LE(self.refs[i], self.refs[j])))
for i in range(self.numInstances):
if isinstance(self.refSort, PrimitiveType):
if self.refSort == "integer":
self.constraints.addRefConstraint(
SMTLib.SMT_Implies(
self.isOff(i),
SMTLib.SMT_EQ(self.refs[i],
SMTLib.SMT_IntConst(0))),
self.known_polarity(i, local=True) !=
Common.DEFINITELY_ON)
elif self.refSort == "string":
if Options.STRING_CONSTRAINTS:
self.constraints.addRefConstraint(
SMTLib.SMT_Implies(
self.isOff(i),
SMTLib.SMT_EQ(self.refs[i],
self.cfr.EMPTYSTRING)),
self.known_polarity(i, local=True) !=
Common.DEFINITELY_ON)
else:
self.constraints.addRefConstraint(
SMTLib.SMT_Implies(
self.isOff(i),
SMTLib.SMT_EQ(self.refs[i],
SMTLib.SMT_IntConst(0))),
self.known_polarity(i, local=True) !=
Common.DEFINITELY_ON)
else:
self.constraints.addRefConstraint(
SMTLib.SMT_Implies(
self.isOff(i),
SMTLib.SMT_EQ(self.refs[i],
SMTLib.SMT_IntConst(0))),
self.known_polarity(i, local=True) !=
Common.DEFINITELY_ON)
else:
if self.known_polarity(i, local=True) != Common.DEFINITELY_ON:
self.constraints.addRefConstraint(
SMTLib.SMT_If(
self.isOff(i),
SMTLib.SMT_EQ(
self.refs[i],
SMTLib.SMT_IntConst(
self.refSort.numInstances)),
SMTLib.SMT_NE(
self.refs[i],
SMTLib.SMT_IntConst(
self.refSort.numInstances))))
else:
self.constraints.addRefConstraint(
SMTLib.SMT_NE(
self.refs[i],
SMTLib.SMT_IntConst(self.refSort.numInstances)))
#if refsort.full does not exist, create it
if not self.refSort.full:
self.refSort.full = lambda x: mOr(*[
SMTLib.SMT_And(
SMTLib.SMT_EQ(x, SMTLib.SMT_IntConst(i)),
self.refSort.isOn(i))
for i in range(self.refSort.numInstances)
])
#the clafer that the reference points to must be "on"
self.constraints.addRefConstraint(
SMTLib.SMT_Implies(
SMTLib.SMT_NE(
self.refs[i],
SMTLib.SMT_IntConst(self.refSort.numInstances)),
self.refSort.full(self.refs[i])))
