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more segfault sources #2205, examining bit2bool internalization for #2282

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-03-27 09:50:13 -07:00
parent 5478955199
commit 51a26ceb9e
2 changed files with 11 additions and 28 deletions
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32
src/smt/theory_bv.cpp
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@ -97,30 +97,6 @@ namespace smt {
// This will also force the creation of all bits for x.
enode * first_arg_enode = ctx.get_enode(first_arg);
get_var(first_arg_enode);
#if 0
// constant axiomatization moved to catch all case in the end of function.
// numerals are not blasted into bit2bool, so we do this directly.
rational val;
unsigned sz;
if (!ctx.b_internalized(n) && m_util.is_numeral(first_arg, val, sz)) {
TRACE("bv", tout << "bit2bool constants\n";);
theory_var v = first_arg_enode->get_th_var(get_id());
app* owner = first_arg_enode->get_owner();
for (unsigned i = 0; i < sz; ++i) {
app* e = mk_bit2bool(owner, i);
ctx.internalize(e, true);
}
m_bits[v].reset();
rational bit;
for (unsigned i = 0; i < sz; ++i) {
div(val, rational::power_of_two(i), bit);
mod(bit, rational(2), bit);
m_bits[v].push_back(bit.is_zero()?false_literal:true_literal);
}
}
#endif
}
enode * arg = ctx.get_enode(first_arg);
@ -144,6 +120,13 @@ namespace smt {
unsigned idx = n->get_decl()->get_parameter(0).get_int();
SASSERT(a->m_occs == 0);
a->m_occs = new (get_region()) var_pos_occ(v_arg, idx);
#if 0
// possible fix for #2162, but effect of fix needs to be checked.
if (idx < m_bits[v_arg].size()) {
ctx.mk_th_axiom(get_id(), m_bits[v_arg][idx], literal(bv, true));
ctx.mk_th_axiom(get_id(), ~m_bits[v_arg][idx], literal(bv, false));
}
#endif
}
// axiomatize bit2bool on constants.
rational val;
@ -782,6 +765,7 @@ namespace smt {
bits.swap(new_bits); \
} \
init_bits(e, bits); \
TRACE("bv", tout << arg_bits << " " << bits << " " << new_bits << "\n";); \
}