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fix model generation, add rewrite rules for sin(acos(x)) reduction to help model validation. Issue #680

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-07-13 11:12:27 -07:00
parent 247e94a7c0
commit 3a70b6aab4
3 changed files with 28 additions and 9 deletions
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14
src/ast/arith_decl_plugin.h
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@ -290,6 +290,8 @@ public:
bool is_asin(expr const* n) const { return is_app_of(n, m_afid, OP_ASIN); }
bool is_acos(expr const* n) const { return is_app_of(n, m_afid, OP_ACOS); }
bool is_atan(expr const* n) const { return is_app_of(n, m_afid, OP_ATAN); }
bool is_pi(expr * arg) { return is_app_of(arg, m_afid, OP_PI); }
bool is_e(expr * arg) { return is_app_of(arg, m_afid, OP_E); }
MATCH_UNARY(is_uminus);
MATCH_UNARY(is_to_real);
@ -307,8 +309,13 @@ public:
MATCH_BINARY(is_idiv);
MATCH_BINARY(is_power);
bool is_pi(expr * arg) { return is_app_of(arg, m_afid, OP_PI); }
bool is_e(expr * arg) { return is_app_of(arg, m_afid, OP_E); }
MATCH_UNARY(is_sin);
MATCH_UNARY(is_asin);
MATCH_UNARY(is_cos);
MATCH_UNARY(is_acos);
MATCH_UNARY(is_tan);
MATCH_UNARY(is_atan);
};
class arith_util : public arith_recognizers {
@ -355,6 +362,9 @@ public:
app * mk_int(int i) {
return mk_numeral(rational(i), true);
}
app * mk_real(int i) {
return mk_numeral(rational(i), false);
}
app * mk_le(expr * arg1, expr * arg2) const { return m_manager.mk_app(m_afid, OP_LE, arg1, arg2); }
app * mk_ge(expr * arg1, expr * arg2) const { return m_manager.mk_app(m_afid, OP_GE, arg1, arg2); }
app * mk_lt(expr * arg1, expr * arg2) const { return m_manager.mk_app(m_afid, OP_LT, arg1, arg2); }