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Added rewriter.ignore_patterns_on_ground_qbody option to disable simplification of quantifiers that have their universals appear only in patterns, but otherwise have a ground body.

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This commit is contained in:
Christoph M. Wintersteiger 2017-04-07 21:19:20 +01:00
parent 9a757ffffe
commit 27a1758857
19 changed files with 795 additions and 776 deletions
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32
src/tactic/core/distribute_forall_tactic.cpp
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@ -24,9 +24,9 @@ class distribute_forall_tactic : public tactic {
ast_manager & m;
rw_cfg(ast_manager & _m):m(_m) {}
bool reduce_quantifier(quantifier * old_q,
expr * new_body,
expr * const * new_patterns,
bool reduce_quantifier(quantifier * old_q,
expr * new_body,
expr * const * new_patterns,
expr * const * new_no_patterns,
expr_ref & result,
proof_ref & result_pr) {
@ -34,7 +34,7 @@ class distribute_forall_tactic : public tactic {
if (!old_q->is_forall()) {
return false;
}
if (m.is_not(new_body) && m.is_or(to_app(new_body)->get_arg(0))) {
// (forall X (not (or F1 ... Fn)))
// -->
@ -50,13 +50,13 @@ class distribute_forall_tactic : public tactic {
quantifier_ref tmp_q(m);
tmp_q = m.update_quantifier(old_q, not_arg);
expr_ref new_q(m);
elim_unused_vars(m, tmp_q, new_q);
elim_unused_vars(m, tmp_q, params_ref(), new_q);
new_args.push_back(new_q);
}
result = m.mk_and(new_args.size(), new_args.c_ptr());
return true;
}
if (m.is_and(new_body)) {
// (forall X (and F1 ... Fn))
// -->
@ -70,20 +70,20 @@ class distribute_forall_tactic : public tactic {
quantifier_ref tmp_q(m);
tmp_q = m.update_quantifier(old_q, arg);
expr_ref new_q(m);
elim_unused_vars(m, tmp_q, new_q);
elim_unused_vars(m, tmp_q, params_ref(), new_q);
new_args.push_back(new_q);
}
result = m.mk_and(new_args.size(), new_args.c_ptr());
return true;
}
return false;
}
};
struct rw : public rewriter_tpl<rw_cfg> {
rw_cfg m_cfg;
rw(ast_manager & m, bool proofs_enabled):
rewriter_tpl<rw_cfg>(m, proofs_enabled, m_cfg),
m_cfg(m) {
@ -99,19 +99,19 @@ public:
return alloc(distribute_forall_tactic);
}
virtual void operator()(goal_ref const & g,
goal_ref_buffer & result,
model_converter_ref & mc,
virtual void operator()(goal_ref const & g,
goal_ref_buffer & result,
model_converter_ref & mc,
proof_converter_ref & pc,
expr_dependency_ref & core) {
SASSERT(g->is_well_sorted());
ast_manager & m = g->m();
bool produce_proofs = g->proofs_enabled();
rw r(m, produce_proofs);
m_rw = &r;
m_rw = &r;
mc = 0; pc = 0; core = 0; result.reset();
tactic_report report("distribute-forall", *g);
expr_ref new_curr(m);
proof_ref new_pr(m);
unsigned size = g->size();
@ -126,12 +126,12 @@ public:
}
g->update(idx, new_curr, new_pr, g->dep(idx));
}
g->inc_depth();
result.push_back(g.get());
TRACE("distribute-forall", g->display(tout););
SASSERT(g->is_well_sorted());
m_rw = 0;
m_rw = 0;
}
virtual void cleanup() {}