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additional bit-vector propagators (#4695)

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
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Nikolaj Bjorner 2020-09-18 12:38:29 -07:00 • committed by GitHub
parent 549753845e
commit 8691ef1d4d
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17 changed files with 423 additions and 121 deletions
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22
src/sat/smt/bv_invariant.cpp
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@ -16,6 +16,7 @@ Author:
--*/
#include "sat/smt/bv_solver.h"
#include "sat/smt/euf_solver.h"
namespace bv {
@ -32,6 +33,27 @@ namespace bv {
}
}
void solver::check_missing_propagation() const {
for (euf::enode* n : ctx.get_egraph().nodes()) {
expr* e = n->get_expr(), *a = nullptr, *b = nullptr;
if (m.is_eq(e, a, b) && bv.is_bv(a) && s().value(expr2literal(e)) == l_undef) {
theory_var v1 = n->get_arg(0)->get_th_var(get_id());
theory_var v2 = n->get_arg(1)->get_th_var(get_id());
SASSERT(v1 != euf::null_theory_var);
SASSERT(v2 != euf::null_theory_var);
unsigned sz = m_bits[v1].size();
for (unsigned i = 0; i < sz; ++i) {
lbool val1 = s().value(m_bits[v1][i]);
lbool val2 = s().value(m_bits[v2][i]);
if (val1 != l_undef && val2 != l_undef && val1 != val2) {
IF_VERBOSE(0, verbose_stream() << "missing " << mk_bounded_pp(e, m) << "\n");
break;
}
}
}
}
}
/**
\brief Check whether m_zero_one_bits is an accurate summary of the bits in the
equivalence class rooted by v.