def op_le(left,right):
'''
:param left:
:type left: :class:`~ExprArg`
:param right:
:type right: :class:`~ExprArg`
:returns: :class:`~BoolArg`
Invariant: left and right have exactly one int
Ensures that the left <= right.
'''
assert isinstance(left, ExprArg)
assert isinstance(right, ExprArg)
lval = left.getInts()
lval = [SMTLib.createIf(c, e, SMTLib.SMT_IntConst(0)) for (e,c) in lval]
rval = right.getInts()
rval = [SMTLib.createIf(c, e, SMTLib.SMT_IntConst(0)) for (e,c) in rval]
lsum = SMTLib.createSum(lval)
rsum = SMTLib.createSum(rval)
return BoolArg(SMTLib.SMT_LE(lsum, rsum))
def op_mul(left,right):
'''
:param left:
:type left: :class:`~ExprArg`
:param right:
:type right: :class:`~ExprArg`
:returns: :class:`~IntArg`
Returns left * right.
'''
assert isinstance(left, ExprArg)
assert isinstance(right, ExprArg)
lval = left.getInts()
lval = [SMTLib.createIf(c, e, SMTLib.SMT_IntConst(0)) for (e,c) in lval]
lval = SMTLib.createSum(lval)
rval = right.getInts()
rval = [SMTLib.createIf(c, e, SMTLib.SMT_IntConst(0)) for (e,c) in rval]
rval = SMTLib.createSum(rval)
return IntArg(SMTLib.SMT_Times(lval, rval))
def op_mul(left, right):
'''
:param left:
:type left: :class:`~ExprArg`
:param right:
:type right: :class:`~ExprArg`
:returns: :class:`~IntArg`
Returns left * right.
'''
assert isinstance(left, ExprArg)
assert isinstance(right, ExprArg)
lval = left.getInts()
lval = [SMTLib.createIf(c, e, SMTLib.SMT_IntConst(0)) for (e, c) in lval]
lval = SMTLib.createSum(lval)
rval = right.getInts()
rval = [SMTLib.createIf(c, e, SMTLib.SMT_IntConst(0)) for (e, c) in rval]
rval = SMTLib.createSum(rval)
return IntArg(SMTLib.SMT_Times(lval, rval))
def op_le(left, right):
'''
:param left:
:type left: :class:`~ExprArg`
:param right:
:type right: :class:`~ExprArg`
:returns: :class:`~BoolArg`
Invariant: left and right have exactly one int
Ensures that the left <= right.
'''
assert isinstance(left, ExprArg)
assert isinstance(right, ExprArg)
lval = left.getInts()
lval = [SMTLib.createIf(c, e, SMTLib.SMT_IntConst(0)) for (e, c) in lval]
rval = right.getInts()
rval = [SMTLib.createIf(c, e, SMTLib.SMT_IntConst(0)) for (e, c) in rval]
lsum = SMTLib.createSum(lval)
rsum = SMTLib.createSum(rval)
return BoolArg(SMTLib.SMT_LE(lsum, rsum))
def op_div(left,right):
'''
:param left:
:type left: :class:`~ExprArg`
:param right:
:type right: :class:`~ExprArg`
:returns: :class:`~IntArg`
Returns left / right.
'''
assert isinstance(left, ExprArg)
assert isinstance(right, ExprArg)
lval = left.getInts()
lval = [SMTLib.createIf(c, e, SMTLib.SMT_IntConst(0)) for (e,c) in lval]
lval = SMTLib.createSum(lval)
rval = right.getInts()
rval = [SMTLib.createIf(c, e, SMTLib.SMT_IntConst(0)) for (e,c) in rval]
rval = SMTLib.createSum(rval)
return IntArg(SMTLib.SMT_Divide(lval, rval)
if((not isinstance(lval, SMTLib.SMT_IntConst)) or (not isinstance(rval, SMTLib.SMT_IntConst)))
else SMTLib.SMT_IntDivide(lval, rval))
def op_un_minus(arg):
'''
:param arg:
:type arg: :class:`~ExprArg`
:returns: :class:`~IntArg`
Negates arg.
'''
assert isinstance(arg, IntArg)
val = arg.getInts()
val = [SMTLib.createIf(c, e, SMTLib.SMT_IntConst(0)) for (e,c) in val]
val_sum = SMTLib.createSum(val)
return IntArg(SMTLib.createNeg(val_sum))
def op_sum(arg):
'''
:param arg:
:type arg: :class:`~ExprArg`
:returns: :class:`~IntArg`
Computes the sum of all integer instances in arg. May not match the semantics of the Alloy backend.
'''
assert isinstance(arg, ExprArg)
sum_list = []
for (e,c) in arg.getInts():
sum_list.append(SMTLib.createIf(c, e, SMTLib.SMT_IntConst(0)))
return IntArg(SMTLib.createSum(sum_list))
def goalVisit(self, element):
bracketedConstraintsVisitor = CreateBracketedConstraints.CreateBracketedConstraints(self.cfr)
op = element.exp.iExp[0].operation
if op == "min":
op = Common.METRICS_MINIMIZE
else:
op = Common.METRICS_MAXIMIZE
expr = bracketedConstraintsVisitor.objectiveVisit(element.exp.iExp[0].elements[0])
if isinstance(expr[0], JoinArg):
#TODO cache stuff here too (pass cfr into computeJoin if caching
expr = operations.Join.computeJoin(expr)
valueList = [SMTLib.createIf(c, i, SMTLib.SMT_IntConst(0)) for (i,c) in expr.getInts()]
self.cfr.objectives.append((op, SMTLib.createSum(valueList)))
def op_div(left, right):
'''
:param left:
:type left: :class:`~ExprArg`
:param right:
:type right: :class:`~ExprArg`
:returns: :class:`~IntArg`
Returns left / right.
'''
assert isinstance(left, ExprArg)
assert isinstance(right, ExprArg)
lval = left.getInts()
lval = [SMTLib.createIf(c, e, SMTLib.SMT_IntConst(0)) for (e, c) in lval]
lval = SMTLib.createSum(lval)
rval = right.getInts()
rval = [SMTLib.createIf(c, e, SMTLib.SMT_IntConst(0)) for (e, c) in rval]
rval = SMTLib.createSum(rval)
return IntArg(
SMTLib.SMT_Divide(lval, rval) if (
(not isinstance(lval, SMTLib.SMT_IntConst)) or (
not isinstance(rval, SMTLib.SMT_IntConst))
) else SMTLib.SMT_IntDivide(lval, rval))
def op_sum(arg):
'''
:param arg:
:type arg: :class:`~ExprArg`
:returns: :class:`~IntArg`
Computes the sum of all integer instances in arg. May not match the semantics of the Alloy backend.
'''
assert isinstance(arg, ExprArg)
sum_list = []
for (e, c) in arg.getInts():
sum_list.append(SMTLib.createIf(c, e, SMTLib.SMT_IntConst(0)))
return IntArg(SMTLib.createSum(sum_list))
def op_un_minus(arg):
'''
:param arg:
:type arg: :class:`~ExprArg`
:returns: :class:`~IntArg`
Negates arg.
'''
assert isinstance(arg, IntArg)
val = arg.getInts()
val = [SMTLib.createIf(c, e, SMTLib.SMT_IntConst(0)) for (e, c) in val]
val_sum = SMTLib.createSum(val)
return IntArg(SMTLib.createNeg(val_sum))
def goalVisit(self, element):
bracketedConstraintsVisitor = CreateBracketedConstraints.CreateBracketedConstraints(
self.cfr)
op = element.exp.iExp[0].operation
if op == "min":
op = Common.METRICS_MINIMIZE
else:
op = Common.METRICS_MAXIMIZE
expr = bracketedConstraintsVisitor.objectiveVisit(
element.exp.iExp[0].elements[0])
if isinstance(expr[0], JoinArg):
#TODO cache stuff here too (pass cfr into computeJoin if caching
expr = operations.Join.computeJoin(expr)
valueList = [
SMTLib.createIf(c, i, SMTLib.SMT_IntConst(0))
for (i, c) in expr.getInts()
]
self.cfr.objectives.append((op, SMTLib.createSum(valueList)))
