Head

GCC Code Coverage Report

Directory:	.		Exec	Total	Coverage
File:	src/theory/skolem_lemma.h	Lines:	1	1	100.0 %
Date:	2021-08-03	Branches:	2	4	50.0 %


/******************************************************************************
 * Top contributors (to current version):
 *   Andrew Reynolds
 *
 * This file is part of the cvc5 project.
 *
 * Copyright (c) 2009-2021 by the authors listed in the file AUTHORS
 * in the top-level source directory and their institutional affiliations.
 * All rights reserved.  See the file COPYING in the top-level source
 * directory for licensing information.
 * ****************************************************************************
 *
 * The skolem lemma utility.
 */

#include "cvc5_private.h"

#ifndef CVC5__THEORY__SKOLEM_LEMMA_H
#define CVC5__THEORY__SKOLEM_LEMMA_H

#include "expr/node.h"
#include "proof/trust_node.h"

namespace cvc5 {
namespace theory {

/**
 * A skolem lemma is a pair containing a trust node repreresenting a lemma
 * and the skolem it is for. A common example would be the trust node proving
 * the lemma:
 *    (ite C (= k A) (= k B))
 * and the skolem k.
 *
 * Skolem lemmas can be used as a way of tracking the relevance of a lemma.
 * They can be used for things like term formula removal and preprocessing.
 */
class SkolemLemma
{
 public:
  /**
   * Make skolem from trust node lem of kind LEMMA and skolem k.
   */
  SkolemLemma(TrustNode lem, Node k);
  /**
   * Make skolem lemma from witness form of skolem k. If non-null, pg is
   * proof generator that can generator a proof for getSkolemLemmaFor(k).
   */
  SkolemLemma(Node k, ProofGenerator* pg);

  /** The lemma, a trust node of kind LEMMA */
  TrustNode d_lemma;
  /** The skolem associated with that lemma */
  Node d_skolem;

  /**
   * Get the lemma for skolem k based on its witness form. If k has witness
   * form (witness ((x T)) (P x)), this is the formula (P k).
   */
  static Node getSkolemLemmaFor(Node k);
};

}  // namespace theory
}  // namespace cvc5

#endif /* CVC5__THEORY__SKOLEM_LEMMA_H */


Generated by: GCOVR (Version 3.2)

Line	Exec	Source
1		/******************************************************************************
2		* Top contributors (to current version):
3		* Andrew Reynolds
4		*
5		* This file is part of the cvc5 project.
6		*
7		* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS
8		* in the top-level source directory and their institutional affiliations.
9		* All rights reserved. See the file COPYING in the top-level source
10		* directory for licensing information.
11		* ****************************************************************************
12		*
13		* The skolem lemma utility.
14		*/
15
16		#include "cvc5_private.h"
17
18		#ifndef CVC5__THEORY__SKOLEM_LEMMA_H
19		#define CVC5__THEORY__SKOLEM_LEMMA_H
20
21		#include "expr/node.h"
22		#include "proof/trust_node.h"
23
24		namespace cvc5 {
25		namespace theory {
26
27		/**
28		* A skolem lemma is a pair containing a trust node repreresenting a lemma
29		* and the skolem it is for. A common example would be the trust node proving
30		* the lemma:
31		* (ite C (= k A) (= k B))
32		* and the skolem k.
33		*
34		* Skolem lemmas can be used as a way of tracking the relevance of a lemma.
35		* They can be used for things like term formula removal and preprocessing.
36		*/
37	7079	class SkolemLemma
38		{
39		public:
40		/**
41		* Make skolem from trust node lem of kind LEMMA and skolem k.
42		*/
43		SkolemLemma(TrustNode lem, Node k);
44		/**
45		* Make skolem lemma from witness form of skolem k. If non-null, pg is
46		* proof generator that can generator a proof for getSkolemLemmaFor(k).
47		*/
48		SkolemLemma(Node k, ProofGenerator* pg);
49
50		/** The lemma, a trust node of kind LEMMA */
51		TrustNode d_lemma;
52		/** The skolem associated with that lemma */
53		Node d_skolem;
54
55		/**
56		* Get the lemma for skolem k based on its witness form. If k has witness
57		* form (witness ((x T)) (P x)), this is the formula (P k).
58		*/
59		static Node getSkolemLemmaFor(Node k);
60		};
61
62		} // namespace theory
63		} // namespace cvc5
64
65		#endif /* CVC5__THEORY__SKOLEM_LEMMA_H */