quant_constraint_1.m:019: In declaration of predicate `quant_constraint_1.p'/2:
quant_constraint_1.m:019:   type variable `T1' is existentially constrained,
quant_constraint_1.m:019:   but is universally quantified.
quant_constraint_1.m:019: In declaration of predicate `quant_constraint_1.p'/2:
quant_constraint_1.m:019:   type variable `T2' is universally constrained, but
quant_constraint_1.m:019:   is existentially quantified.