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Do a quick check for feasibility w.r.t. bits before using forbidden intervals

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This commit is contained in:
Clemens Eisenhofer 2023-02-15 20:06:13 +01:00
parent e07c77e072
commit 5ddc727f91
6 changed files with 439 additions and 6 deletions
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8
src/math/polysat/variable_elimination.cpp
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@ -749,16 +749,18 @@ namespace polysat {
if (a_parity != a_max_parity || (a_parity > 0 && saturation.min_parity(a1, explain_a_parity) < a_parity))
return { p, false }; // We need the parity of a and this has to be for sure less than the parity of a1
#if 0
pdd a_pi = get_pseudo_inverse(a, a_parity);
#else
pdd a_pi = s.pseudo_inv(a);
for (auto c : explain_a_parity)
precondition.insert_eval(~c);
if (b.is_zero())
return { b1, true };
#endif
pdd shift = a; // [nsb cr: should this be a1?]
pdd shift = a1;
if (a_parity > 0) {
shift = s.lshr(a1, a1.manager().mk_val(a_parity));