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adding div0

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-11-06 11:23:10 +01:00
parent 1048abfd9f
commit 6cf7d8e523
6 changed files with 86 additions and 14 deletions
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20
src/ast/arith_decl_plugin.cpp
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@ -362,6 +362,11 @@ inline func_decl * arith_decl_plugin::mk_func_decl(decl_kind k, bool is_real) {
case OP_IDIVIDES: UNREACHABLE();
case OP_REM: return m_i_rem_decl;
case OP_MOD: return m_i_mod_decl;
case OP_DIV0: return m_manager->mk_func_decl(symbol("div0"), m_real_decl, m_real_decl, m_real_decl, func_decl_info(m_family_id, OP_DIV0));
case OP_IDIV0: return m_manager->mk_func_decl(symbol("idiv0"), m_real_decl, m_real_decl, m_real_decl, func_decl_info(m_family_id, OP_IDIV0));
case OP_REM0: return m_manager->mk_func_decl(symbol("rem0"), m_real_decl, m_real_decl, m_real_decl, func_decl_info(m_family_id, OP_REM0));
case OP_MOD0: return m_manager->mk_func_decl(symbol("mod0"), m_real_decl, m_real_decl, m_real_decl, func_decl_info(m_family_id, OP_MOD0));
case OP_POWER0: return m_manager->mk_func_decl(symbol("power0"), m_real_decl, m_real_decl, m_real_decl, func_decl_info(m_family_id, OP_POWER0));
case OP_TO_REAL: return m_to_real_decl;
case OP_TO_INT: return m_to_int_decl;
case OP_IS_INT: return m_is_int_decl;
@ -780,18 +785,31 @@ expr_ref arith_util::mk_add_simplify(unsigned sz, expr* const* args) {
return result;
}
bool arith_util::is_considered_uninterpreted(func_decl* f, unsigned n, expr* const* args) {
bool arith_util::is_considered_uninterpreted(func_decl* f, unsigned n, expr* const* args, func_decl_ref& f_out) {
rational r;
if (is_decl_of(f, m_afid, OP_DIV) && is_numeral(args[1], r) && r.is_zero()) {
sort* rs[2] = { mk_real(), mk_real() };
f_out = m_manager.mk_func_decl(m_afid, OP_DIV0, 0, nullptr, 2, rs, mk_real());
return true;
}
if (is_decl_of(f, m_afid, OP_IDIV) && is_numeral(args[1], r) && r.is_zero()) {
sort* rs[2] = { mk_real(), mk_real() };
f_out = m_manager.mk_func_decl(m_afid, OP_IDIV0, 0, nullptr, 2, rs, mk_real());
return true;
}
if (is_decl_of(f, m_afid, OP_MOD) && is_numeral(args[1], r) && r.is_zero()) {
sort* rs[2] = { mk_real(), mk_real() };
f_out = m_manager.mk_func_decl(m_afid, OP_MOD0, 0, nullptr, 2, rs, mk_real());
return true;
}
if (is_decl_of(f, m_afid, OP_REM) && is_numeral(args[1], r) && r.is_zero()) {
sort* rs[2] = { mk_real(), mk_real() };
f_out = m_manager.mk_func_decl(m_afid, OP_REM0, 0, nullptr, 2, rs, mk_real());
return true;
}
if (is_decl_of(f, m_afid, OP_POWER) && is_numeral(args[1], r) && r.is_zero() && is_numeral(args[0], r) && r.is_zero()) {
sort* rs[2] = { mk_real(), mk_real() };
f_out = m_manager.mk_func_decl(m_afid, OP_POWER0, 0, nullptr, 2, rs, mk_real());
return true;
}
return plugin().is_considered_uninterpreted(f);