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• Ipasir-formula

Ipasir-add-unary

Add a unary clause to the formula, permanently restricting the given literal to be true.

Signature

(ipasir-add-unary ipasir a) → new-ipasir

Arguments

a — Guard (litp a).

Definitions and Theorems

Function: ipasir-add-unary

(defun ipasir-add-unary (ipasir a)
 (declare (xargs :stobjs (ipasir)))
 (declare (xargs :guard (litp a)))
 (declare
     (xargs :guard (and (not (eq (ipasir-get-status ipasir) :undef))
                        (ipasir-empty-new-clause ipasir))))
 (let ((__function__ 'ipasir-add-unary))
   (declare (ignorable __function__))
   (b* ((ipasir (ipasir-cancel-new-clause ipasir))
        (ipasir (ipasir-add-lit ipasir a)))
     (ipasir-finalize-clause ipasir))))

Theorem: ipasir-add-unary-status

(defthm ipasir-add-unary-status
  (b* ((?new-ipasir (ipasir-add-unary ipasir a)))
    (equal (ipasir$a->status new-ipasir)
           :input)))

Theorem: ipasir-add-unary-formula

(defthm ipasir-add-unary-formula
  (b* ((?new-ipasir (ipasir-add-unary ipasir a)))
    (equal (ipasir$a->formula new-ipasir)
           (cons (lit-list-fix (list a))
                 (ipasir$a->formula ipasir)))))

Theorem: ipasir-add-unary-eval-formula

(defthm ipasir-add-unary-eval-formula
  (b* ((?new-ipasir (ipasir-add-unary ipasir a)))
    (equal (eval-formula (ipasir$a->formula new-ipasir)
                         env)
           (b-and (eval-lit a env)
                  (eval-formula (ipasir$a->formula ipasir)
                                env)))))

Theorem: ipasir-add-unary-new-clause

(defthm ipasir-add-unary-new-clause
  (b* ((?new-ipasir (ipasir-add-unary ipasir a)))
    (not (ipasir$a->new-clause new-ipasir))))

Theorem: ipasir-add-unary-assumption

(defthm ipasir-add-unary-assumption
  (b* ((?new-ipasir (ipasir-add-unary ipasir a)))
    (equal (ipasir$a->assumption new-ipasir)
           (ipasir$a->assumption ipasir))))