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invertible: fix bug with numerals, e.g. (bvmull x y #x32)

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This commit is contained in:
Nuno Lopes 2018-07-04 16:50:37 +01:00
parent 53e582ba22
commit 9826835e15
1 changed files with 10 additions and 6 deletions
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16
src/tactic/core/reduce_invertible_tactic.cpp
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@ -168,7 +168,7 @@ private:
if (mc && !(*mc)) *mc = alloc(generic_model_converter, m, "reduce-invertible");
}
bool is_full_domain_var(expr* v, const rational*& model) {
bool is_full_domain_var(expr* v, rational& model) {
auto f = is_app(v) ? to_app(v)->get_decl() : nullptr;
if (!f || f->get_family_id() != m_bv.get_family_id() || f->get_arity() == 0)
return false;
@ -180,11 +180,11 @@ private:
case OP_BASHR:
case OP_BLSHR:
case OP_BOR:
model = &rational::zero();
model = rational::zero();
return true;
case OP_BAND:
model = &rational::minus_one();
model = rational::power_of_two(m_bv.get_bv_size(v)) - rational::one();
return true;
case OP_BMUL:
@ -194,7 +194,7 @@ private:
case OP_BUDIV:
case OP_BUDIV0:
case OP_BUDIV_I:
model = &rational::one();
model = rational::one();
return true;
default:
@ -203,10 +203,11 @@ private:
}
bool rewrite_unconstr(expr* v, expr_ref& new_v, generic_model_converter_ref* mc, unsigned max_var) {
const rational* mdl;
rational mdl;
if (!is_full_domain_var(v, mdl))
return false;
rational r;
app* a = to_app(v);
expr* fst_arg = a->get_arg(0);
bool fst_is_var = is_var(fst_arg);
@ -218,11 +219,14 @@ private:
if (fst_is_var && to_var(arg)->get_idx() >= max_var)
return false;
if (m_bv.is_numeral(arg, r) && r != mdl)
return false;
}
if (mc) {
ensure_mc(mc);
expr_ref num(m_bv.mk_numeral(*mdl, get_sort(fst_arg)), m);
expr_ref num(m_bv.mk_numeral(mdl, get_sort(fst_arg)), m);
for (unsigned i = 1, n = a->get_num_args(); i != n; ++i) {
(*mc)->add(a->get_arg(i), num);
}