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app ordering that puts special skolem constants first

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This commit is contained in:
Arie Gurfinkel 2017-08-07 11:47:57 +02:00
parent 9f0eb367b1
commit 6cf68bee80
2 changed files with 26 additions and 0 deletions
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22
src/muz/spacer/spacer_manager.cpp
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@ -384,4 +384,26 @@ bool has_zk_const(expr *e){
return false;
}
bool is_zk_const (const app *a, int &n) {
if (!is_uninterp_const(a)) return false;
const symbol &name = a->get_decl()->get_name();
if (name.str().compare (0, 3, "sk!") != 0) {
return false;
}
n = std::stoi(name.str().substr(3));
return true;
}
bool sk_lt_proc::operator()(const app *a1, const app *a2) {
if (a1 == a2) return false;
int n1, n2;
bool z1, z2;
z1 = is_zk_const(a1, n1);
z2 = is_zk_const(a2, n2);
if (z1 && z2) return n1 < n2;
if (z1 != z2) return z1;
return ast_lt_proc()(a1, a2);
}
}

4
src/muz/spacer/spacer_manager.h
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@ -341,6 +341,10 @@ public:
app* mk_zk_const (ast_manager &m, unsigned idx, sort *s);
void find_zk_const(expr* e, app_ref_vector &out);
bool has_zk_const(expr* e);
struct sk_lt_proc {
bool operator()(const app* a1, const app* a2);
};
}
#endif