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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
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Leonardo de Moura 2012-10-02 11:35:25 -07:00
parent 3f9edad676
commit e9eab22e5c
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lib/spc_eq_resolution.cpp Normal file
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/*++
Copyright (c) 2006 Microsoft Corporation
Module Name:
spc_eq_resolution.cpp
Abstract:
<abstract>
Author:
Leonardo de Moura (leonardo) 2008-02-14.
Revision History:
--*/
#include"spc_eq_resolution.h"
namespace spc {
/**
\brief Apply equality resolution rule on the given clause.
Store the produced clauses in new_clauses.
*/
void eq_resolution::operator()(clause * cls, ptr_vector<clause> & new_clauses) {
m_subst.reserve_vars(cls->get_num_vars());
unsigned num = cls->get_num_literals();
for (unsigned i = 0; i < num; i++) {
literal const & l = cls->get_literal(i);
expr * atom = l.atom();
if (l.sign() && m_manager.is_eq(atom)) {
expr * lhs = to_app(atom)->get_arg(0);
expr * rhs = to_app(atom)->get_arg(1);
m_subst.reset();
if (m_unifier(lhs, rhs, m_subst, false) && cls->is_eligible_for_resolution(m_order, l, 0, &m_subst)) {
m_stats.m_num_eq_resolution++;
new_clauses.push_back(mk_result(cls, i));
}
}
}
}
};