AltErgoLib.Sig_reltype 'a literal = 'a Xliteral.view Literal.viewtype instances = (Expr.t list * Expr.gformula * Explanation.t) listtype 'a input =
  'a Xliteral.view * Expr.t option * Explanation.t * Th_util.lit_origintype 'a fact = 'a literal * Explanation.t * Th_util.lit_originmodule type RELATION = sig ... end