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fix bug in slice creation: exposed by 3047RIHj3agM.smt2

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This commit is contained in:
Nikolaj Bjorner 2024-02-06 16:00:33 -08:00
parent 3f3ac924ab
commit 74a91f691f
1 changed files with 11 additions and 7 deletions
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18
src/ast/euf/euf_bv_plugin.cpp
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@ -181,9 +181,12 @@ namespace euf {
if (is_concat(sib, a, b)) {
auto val_a = machine_div2k(val_x, width(b));
auto val_b = mod2k(val_x, width(b));
push_merge(mk_concat(mk_value(val_a, width(a)), mk_value(val_b, width(b))), x->get_interpreted());
a = mk_value(val_a, width(a));
b = mk_value(val_b, width(b));
push_merge(mk_concat(a, b), x->get_interpreted());
}
}
}
//
@ -306,21 +309,21 @@ namespace euf {
enode* r = n;
unsigned lb = 0, ub = width(n) - 1;
while (true) {
TRACE("bv", tout << "ensure slice " << g.bpp(n) << " " << lb << " [" << lo << ", " << hi << "] " << ub << "\n");
SASSERT(lb <= lo && hi <= ub);
SASSERT(ub - lb + 1 == width(r));
if (lb == lo && ub == hi)
return;
slice_info const& i = info(r);
TRACE("bv", tout << "ensure slice " << g.bpp(n) << " " << lb << " [" << lo << ", " << hi << "] " << ub << "\n" << "has-lo: " << (!!i.lo) << " " << i.cut << "\n";);
if (!i.lo) {
if (lo > lb) {
split(r, lo - lb);
if (hi < ub) // or split(info(r).hi, ...)
ensure_slice(n, lo, hi);
}
else if (hi < ub)
split(r, ub - hi);
else if (hi < ub)
split(r, hi - lo + 1);
break;
}
auto cut = i.cut;
@ -407,7 +410,6 @@ namespace euf {
}
void bv_plugin::split(enode* n, unsigned cut) {
TRACE("bv", tout << "split: " << g.bpp(n) << " " << cut << "\n");
unsigned w = width(n);
SASSERT(!info(n).hi);
SASSERT(0 < cut && cut < w);
@ -419,7 +421,9 @@ namespace euf {
i.lo = lo;
i.cut = cut;
push_undo_split(n);
push_merge(mk_concat(hi, lo), n);
auto n0 = mk_concat(hi, lo);
TRACE("bv", tout << "split: " << g.bpp(n) << " " << cut << " -> " << g.bpp(n0) << "\n");
push_merge(n0, n);
}
void bv_plugin::sub_slices(enode* n, std::function<bool(enode*, unsigned)>& consumer) {