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add bounded-int and pb2bv solvers to fd_solver, use sorting networks for pb2bv rewriter when applicable, hoist to pb2bv_rewriter module and remove it from the pb2bv_tactic

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-10-23 20:31:59 -07:00
parent 6d3430c689
commit 3778048eb4
26 changed files with 1424 additions and 700 deletions
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7
src/ast/rewriter/pb_rewriter.cpp
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@ -257,7 +257,12 @@ br_status pb_rewriter::mk_app_core(func_decl * f, unsigned num_args, expr * cons
all_unit &= m_coeffs.back().is_one();
}
if (is_eq) {
result = m_util.mk_eq(sz, m_coeffs.c_ptr(), m_args.c_ptr(), k);
if (sz == 0) {
result = k.is_zero()?m.mk_true():m.mk_false();
}
else {
result = m_util.mk_eq(sz, m_coeffs.c_ptr(), m_args.c_ptr(), k);
}
}
else if (all_unit && k.is_one()) {
result = mk_or(m, sz, m_args.c_ptr());