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axioms for b-and

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2023-12-11 15:45:54 -08:00
parent 15bae80cea
commit b72575148f
7 changed files with 106 additions and 8 deletions
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27
src/sat/smt/intblast_solver.cpp
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@ -13,6 +13,7 @@ Author:
#include "ast/ast_util.h"
#include "ast/for_each_expr.h"
#include "params/bv_rewriter_params.hpp"
#include "sat/smt/intblast_solver.h"
#include "sat/smt/euf_solver.h"
@ -25,7 +26,8 @@ namespace intblast {
m(ctx.get_manager()),
bv(m),
a(m),
m_trail(m)
m_trail(m),
m_pinned(m)
{}
lbool solver::check() {
@ -82,7 +84,6 @@ namespace intblast {
m_core.reset();
m_vars.reset();
m_trail.reset();
m_new_funs.reset();
m_solver = mk_smt2_solver(m, s.params(), symbol::null);
expr_ref_vector es(m);
@ -284,6 +285,8 @@ namespace intblast {
if (!m_new_funs.find(f, g)) {
g = m.mk_fresh_func_decl(ap->get_decl()->get_name(), symbol("bv"), domain.size(), domain.data(), range);
m_new_funs.insert(f, g);
m_pinned.push_back(f);
m_pinned.push_back(g);
}
f = g;
}
@ -452,6 +455,24 @@ namespace intblast {
m_trail.push_back(p);
break;
}
case OP_BUDIV: {
bv_rewriter_params p(ctx.s().params());
expr* x = args.get(0), * y = args.get(1);
if (p.hi_div0())
m_trail.push_back(m.mk_ite(m.mk_eq(y, a.mk_int(0)), a.mk_int(0), a.mk_idiv(x, y)));
else
m_trail.push_back(a.mk_idiv(x, y));
break;
}
case OP_BUREM: {
bv_rewriter_params p(ctx.s().params());
expr* x = args.get(0), * y = args.get(1);
if (p.hi_div0())
m_trail.push_back(m.mk_ite(m.mk_eq(y, a.mk_int(0)), a.mk_int(0), a.mk_mod(x, y)));
else
m_trail.push_back(a.mk_mod(x, y));
break;
}
case OP_BCOMP:
case OP_BASHR:
case OP_ROTATE_LEFT:
@ -463,9 +484,7 @@ namespace intblast {
case OP_SIGN_EXT:
case OP_BREDOR:
case OP_BREDAND:
case OP_BUDIV:
case OP_BSDIV:
case OP_BUREM:
case OP_BSREM:
case OP_BSMOD:
verbose_stream() << mk_pp(e, m) << "\n";