package libzipperposition

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package libzipperposition
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Selection functions

See "E: a brainiac theorem prover". A selection function returns a bitvector of selected literals.

The strict parameter, if true, means only one negative literal is selected (at most); if strict=false then all positive literals are also selected.

type t = Logtk.Literal.t array -> CCBV.t
type parametrized = strict:bool -> ord:Logtk.Ordering.t -> t
val no_select : t

Never select literals.

val max_goal : parametrized

Select a maximal negative literal, if any, or nothing

val except_RR_horn : parametrized -> parametrized

except_RR_horn p behaves like p, except if the clause is a range-restricted Horn clause. In that case, we assume the clause is a (conditional) rewrite rule and we don't prevent using it as an active clause.

Global selection Functions

val default : ord:Logtk.Ordering.t -> t

Default selection function

val e_sel : ord:Logtk.Ordering.t -> t

Selection function identical to E's SelectMaxLComplexAvoidPosPred

val e_sel2 : ord:Logtk.Ordering.t -> t

Selection function identical to E's SelectCQIPrecWNTNp

val e_sel3 : ord:Logtk.Ordering.t -> t

Selection function identical to E's SelectComplexG

val e_sel5 : ord:Logtk.Ordering.t -> t

Selection function identical to E's SelectNDepth2OptimalLiteral

val e_sel6 : ord:Logtk.Ordering.t -> t

Selection function identical to E's SelectLargestOrientable

val e_sel7 : ord:Logtk.Ordering.t -> t

Selection function identical to E's SelectComplexExceptRRHorn

val e_sel8 : ord:Logtk.Ordering.t -> t

Selection function identical to E's SelectCQArNTNpEqFirst

val ho_sel : ord:Logtk.Ordering.t -> t

Selection function that tries to take into account the number of nested applied variables.

The assumption is that they are hard for unification.

val from_string : ord:Logtk.Ordering.t -> string -> t

selection function from string (may fail)

val all : unit -> string list

available names for selection functions