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recursive function definitions; combine model-building functionality

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-03-03 07:59:03 -08:00
parent 6fa2338edc
commit 7c6540e18f
19 changed files with 129 additions and 173 deletions
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12
src/cmd_context/cmd_context.cpp
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@ -837,10 +837,16 @@ void cmd_context::insert_rec_fun(func_decl* f, expr_ref_vector const& binding, s
eq = m().mk_eq(lhs, e);
if (!ids.empty()) {
expr* pat = m().mk_pattern(lhs);
eq = m().mk_forall(ids.size(), f->get_domain(), ids.c_ptr(), eq, 0, symbol(":rec-fun"), symbol::null, 1, &pat);
eq = m().mk_forall(ids.size(), f->get_domain(), ids.c_ptr(), eq, 0, m().rec_fun_qid(), symbol::null, 1, &pat);
}
if (!ids.empty() && !m_rec_fun_declared) {
warning_msg("recursive functions are currently only partially supported: they are translated into recursive equations without special handling");
//
// disable warning given the current way they are used
// (Z3 will here silently assume and not check the definitions to be well founded,
// and please use HSF for everything else).
//
if (false && !ids.empty() && !m_rec_fun_declared) {
warning_msg("recursive function definitions are assumed well-founded");
m_rec_fun_declared = true;
}
assert_expr(eq);