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integrate lookahead v1 into repair loop

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this ports some functionality from lookahead solver for qfbv-sls into sls-smt.
This commit is contained in:
Nikolaj Bjorner 2024-12-26 17:49:30 -08:00
parent c58171478f
commit 5eb71c3be6
9 changed files with 214 additions and 104 deletions
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35
src/ast/sls/sls_bv_evaluator.h
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@ -451,25 +451,34 @@ public:
case OP_BLSHR: {
SASSERT(n_args == 2);
m_mpz_manager.set(result, m_tracker.get_value(args[0]));
mpz shift; m_mpz_manager.set(shift, m_tracker.get_value(args[1]));
while (!m_mpz_manager.is_zero(shift)) {
m_mpz_manager.machine_div(result, m_two, result);
m_mpz_manager.dec(shift);
auto const& shift = m_tracker.get_value(args[1]);
if (m_mpz_manager.is_small(shift)) {
int s = m_mpz_manager.get_int(shift);
SASSERT(s >= 0);
m_mpz_manager.machine_div2k(result, s);
}
m_mpz_manager.del(shift);
else
m_mpz_manager.set(result, m_zero);
break;
}
case OP_BSHL: {
SASSERT(n_args == 2);
m_mpz_manager.set(result, m_tracker.get_value(args[0]));
mpz shift; m_mpz_manager.set(shift, m_tracker.get_value(args[1]));
while (!m_mpz_manager.is_zero(shift)) {
m_mpz_manager.mul(result, m_two, result);
m_mpz_manager.dec(shift);
m_mpz_manager.set(result, m_tracker.get_value(args[0]));
auto const& shift = m_tracker.get_value(args[1]);
if (m_mpz_manager.is_small(shift)) {
int s = m_mpz_manager.get_int(shift);
SASSERT(s >= 0);
int sz = m_bv_util.get_bv_size(n);
if (s >= sz)
m_mpz_manager.set(result, m_zero);
else {
m_mpz_manager.mul2k(result, s);
const mpz& p = m_powers(sz);
m_mpz_manager.rem(result, p, result);
}
}
const mpz & p = m_powers(m_bv_util.get_bv_size(n));
m_mpz_manager.rem(result, p, result);
m_mpz_manager.del(shift);
else
m_mpz_manager.set(result, m_zero);
break;
}
case OP_SIGN_EXT: {