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Z3 sources

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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
This commit is contained in:
Leonardo de Moura 2012-10-02 11:35:25 -07:00
parent 3f9edad676
commit e9eab22e5c
1186 changed files with 381859 additions and 0 deletions
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77
lib/expr_delta.cpp Normal file
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#include "expr_delta.h"
#include "ast_pp.h"
expr_delta::expr_delta(ast_manager& m) : m_manager(m), m_exprs(m) {}
void expr_delta::assert_cnstr(expr* n) {
m_exprs.push_back(n);
}
bool expr_delta::delta_dfs(unsigned n, expr_ref_vector& result) {
return delta_dfs(n, m_exprs.size(), m_exprs.c_ptr(), result);
}
bool expr_delta::delta_dfs(unsigned& n, unsigned sz, expr* const* exprs, expr_ref_vector& result) {
expr_ref r(m_manager);
for (unsigned i = 0; i < sz; ++i) {
expr* e = exprs[i];
if (delta_dfs(n, e, r)) {
result.push_back(r.get());
for (unsigned j = i+1; j < sz; ++j) {
result.push_back(exprs[j]);
}
return true;
}
else {
result.push_back(e);
}
}
return false;
}
bool expr_delta::delta_dfs(unsigned& n, app* a, expr_ref& result) {
expr_ref_vector args(m_manager);
if (delta_dfs(n, a->get_num_args(), a->get_args(), args)) {
result = m_manager.mk_app(a->get_decl(), args.size(), args.c_ptr());
return true;
}
else {
return false;
}
}
bool expr_delta::delta_dfs(unsigned& n, expr* e, expr_ref& result) {
ast_manager& m = m_manager;
if (m.is_true(e) || m.is_false(e)) {
return false;
}
if (n == 0 && m.is_bool(e)) {
result = m.mk_true();
return true;
}
else if (n == 1 && m.is_bool(e)) {
result = m.mk_false();
return true;
}
else if (is_app(e)) {
if (m.is_bool(e)) {
SASSERT(n >= 2);
n -= 2;
}
return delta_dfs(n, to_app(e), result);
}
else if (is_quantifier(e)) {
SASSERT(n >= 2);
n -= 2;
quantifier* q = to_quantifier(e);
if (delta_dfs(n, q->get_expr(), result)) {
result = m.update_quantifier(q, result.get());
return true;
}
else {
return false;
}
}
return false;
}