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Add comprehensive unit tests for finite set rewrite rules

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Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
This commit is contained in:
copilot-swe-agent[bot] 2025-10-14 17:06:31 +00:00
parent 9f285d8fdc
commit deca1aede8
1 changed files with 185 additions and 6 deletions
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191
src/test/finite_set_rewriter.cpp
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@ -36,9 +36,9 @@ static void test_union_idempotent() {
app_ref s1(fsets.mk_range(zero, ten), m);
// Test set.union(s1, s1) -> s1
expr* args[2] = { s1, s1 };
app_ref union_app(fsets.mk_union(s1, s1), m);
expr_ref result(m);
br_status st = rw.mk_union(2, args, result);
br_status st = rw.mk_app_core(union_app->get_decl(), union_app->get_num_args(), union_app->get_args(), result);
ENSURE(st == BR_DONE);
ENSURE(result == s1);
@ -59,9 +59,9 @@ static void test_intersect_idempotent() {
app_ref s1(fsets.mk_range(zero, ten), m);
// Test set.intersect(s1, s1) -> s1
expr* args[2] = { s1, s1 };
app_ref intersect_app(fsets.mk_intersect(s1, s1), m);
expr_ref result(m);
br_status st = rw.mk_intersect(2, args, result);
br_status st = rw.mk_app_core(intersect_app->get_decl(), intersect_app->get_num_args(), intersect_app->get_args(), result);
ENSURE(st == BR_DONE);
ENSURE(result == s1);
@ -82,8 +82,9 @@ static void test_difference_same() {
app_ref s1(fsets.mk_range(zero, ten), m);
// Test set.difference(s1, s1) -> empty
app_ref diff_app(fsets.mk_difference(s1, s1), m);
expr_ref result(m);
br_status st = rw.mk_difference(s1, s1, result);
br_status st = rw.mk_app_core(diff_app->get_decl(), diff_app->get_num_args(), diff_app->get_args(), result);
ENSURE(st == BR_DONE);
ENSURE(fsets.is_empty(result));
@ -106,8 +107,9 @@ static void test_subset_rewrite() {
app_ref s2(fsets.mk_range(zero, twenty), m);
// Test set.subset(s1, s2) -> set.intersect(s1, s2) = s1
app_ref subset_app(fsets.mk_subset(s1, s2), m);
expr_ref result(m);
br_status st = rw.mk_subset(s1, s2, result);
br_status st = rw.mk_app_core(subset_app->get_decl(), subset_app->get_num_args(), subset_app->get_args(), result);
ENSURE(st == BR_REWRITE3);
ENSURE(m.is_eq(result));
@ -148,10 +150,187 @@ static void test_mk_app_core() {
ENSURE(result == s1);
}
static void test_union_with_empty() {
ast_manager m;
reg_decl_plugins(m);
finite_set_util fsets(m);
finite_set_rewriter rw(m);
arith_util arith(m);
// Create a set and empty set
sort_ref int_sort(arith.mk_int(), m);
expr_ref zero(arith.mk_int(0), m);
expr_ref ten(arith.mk_int(10), m);
app_ref s1(fsets.mk_range(zero, ten), m);
app_ref empty_set(fsets.mk_empty(s1->get_sort()), m);
// Test set.union(s1, empty) -> s1
app_ref union_app1(fsets.mk_union(s1, empty_set), m);
expr_ref result1(m);
br_status st1 = rw.mk_app_core(union_app1->get_decl(), union_app1->get_num_args(), union_app1->get_args(), result1);
ENSURE(st1 == BR_DONE);
ENSURE(result1 == s1);
// Test set.union(empty, s1) -> s1
app_ref union_app2(fsets.mk_union(empty_set, s1), m);
expr_ref result2(m);
br_status st2 = rw.mk_app_core(union_app2->get_decl(), union_app2->get_num_args(), union_app2->get_args(), result2);
ENSURE(st2 == BR_DONE);
ENSURE(result2 == s1);
}
static void test_intersect_with_empty() {
ast_manager m;
reg_decl_plugins(m);
finite_set_util fsets(m);
finite_set_rewriter rw(m);
arith_util arith(m);
// Create a set and empty set
sort_ref int_sort(arith.mk_int(), m);
expr_ref zero(arith.mk_int(0), m);
expr_ref ten(arith.mk_int(10), m);
app_ref s1(fsets.mk_range(zero, ten), m);
app_ref empty_set(fsets.mk_empty(s1->get_sort()), m);
// Test set.intersect(s1, empty) -> empty
app_ref intersect_app1(fsets.mk_intersect(s1, empty_set), m);
expr_ref result1(m);
br_status st1 = rw.mk_app_core(intersect_app1->get_decl(), intersect_app1->get_num_args(), intersect_app1->get_args(), result1);
ENSURE(st1 == BR_DONE);
ENSURE(result1 == empty_set);
// Test set.intersect(empty, s1) -> empty
app_ref intersect_app2(fsets.mk_intersect(empty_set, s1), m);
expr_ref result2(m);
br_status st2 = rw.mk_app_core(intersect_app2->get_decl(), intersect_app2->get_num_args(), intersect_app2->get_args(), result2);
ENSURE(st2 == BR_DONE);
ENSURE(result2 == empty_set);
}
static void test_difference_with_empty() {
ast_manager m;
reg_decl_plugins(m);
finite_set_util fsets(m);
finite_set_rewriter rw(m);
arith_util arith(m);
// Create a set and empty set
sort_ref int_sort(arith.mk_int(), m);
expr_ref zero(arith.mk_int(0), m);
expr_ref ten(arith.mk_int(10), m);
app_ref s1(fsets.mk_range(zero, ten), m);
app_ref empty_set(fsets.mk_empty(s1->get_sort()), m);
// Test set.difference(s1, empty) -> s1
app_ref diff_app1(fsets.mk_difference(s1, empty_set), m);
expr_ref result1(m);
br_status st1 = rw.mk_app_core(diff_app1->get_decl(), diff_app1->get_num_args(), diff_app1->get_args(), result1);
ENSURE(st1 == BR_DONE);
ENSURE(result1 == s1);
// Test set.difference(empty, s1) -> empty
app_ref diff_app2(fsets.mk_difference(empty_set, s1), m);
expr_ref result2(m);
br_status st2 = rw.mk_app_core(diff_app2->get_decl(), diff_app2->get_num_args(), diff_app2->get_args(), result2);
ENSURE(st2 == BR_DONE);
ENSURE(result2 == empty_set);
}
static void test_subset_with_empty() {
ast_manager m;
reg_decl_plugins(m);
finite_set_util fsets(m);
finite_set_rewriter rw(m);
arith_util arith(m);
// Create a set and empty set
sort_ref int_sort(arith.mk_int(), m);
expr_ref zero(arith.mk_int(0), m);
expr_ref ten(arith.mk_int(10), m);
app_ref s1(fsets.mk_range(zero, ten), m);
app_ref empty_set(fsets.mk_empty(s1->get_sort()), m);
// Test set.subset(empty, s1) -> true
app_ref subset_app1(fsets.mk_subset(empty_set, s1), m);
expr_ref result1(m);
br_status st1 = rw.mk_app_core(subset_app1->get_decl(), subset_app1->get_num_args(), subset_app1->get_args(), result1);
ENSURE(st1 == BR_DONE);
ENSURE(m.is_true(result1));
// Test set.subset(s1, s1) -> true
app_ref subset_app2(fsets.mk_subset(s1, s1), m);
expr_ref result2(m);
br_status st2 = rw.mk_app_core(subset_app2->get_decl(), subset_app2->get_num_args(), subset_app2->get_args(), result2);
ENSURE(st2 == BR_DONE);
ENSURE(m.is_true(result2));
}
static void test_in_singleton() {
ast_manager m;
reg_decl_plugins(m);
finite_set_util fsets(m);
finite_set_rewriter rw(m);
arith_util arith(m);
// Create elements and singleton
expr_ref five(arith.mk_int(5), m);
expr_ref ten(arith.mk_int(10), m);
app_ref singleton_five(fsets.mk_singleton(five), m);
// Test set.in(five, singleton(five)) -> true
app_ref in_app1(fsets.mk_in(five, singleton_five), m);
expr_ref result1(m);
br_status st1 = rw.mk_app_core(in_app1->get_decl(), in_app1->get_num_args(), in_app1->get_args(), result1);
ENSURE(st1 == BR_DONE);
ENSURE(m.is_true(result1));
// Test set.in(ten, singleton(five)) -> ten = five
app_ref in_app2(fsets.mk_in(ten, singleton_five), m);
expr_ref result2(m);
br_status st2 = rw.mk_app_core(in_app2->get_decl(), in_app2->get_num_args(), in_app2->get_args(), result2);
ENSURE(st2 == BR_REWRITE1);
ENSURE(m.is_eq(result2));
}
static void test_in_empty() {
ast_manager m;
reg_decl_plugins(m);
finite_set_util fsets(m);
finite_set_rewriter rw(m);
arith_util arith(m);
// Create element and empty set
sort_ref int_sort(arith.mk_int(), m);
expr_ref five(arith.mk_int(5), m);
parameter param(int_sort.get());
sort_ref set_sort(m.mk_sort(fsets.get_family_id(), FINITE_SET_SORT, 1, &param), m);
app_ref empty_set(fsets.mk_empty(set_sort), m);
// Test set.in(five, empty) -> false
app_ref in_app(fsets.mk_in(five, empty_set), m);
expr_ref result(m);
br_status st = rw.mk_app_core(in_app->get_decl(), in_app->get_num_args(), in_app->get_args(), result);
ENSURE(st == BR_DONE);
ENSURE(m.is_false(result));
}
void tst_finite_set_rewriter() {
test_union_idempotent();
test_intersect_idempotent();
test_difference_same();
test_subset_rewrite();
test_mk_app_core();
test_union_with_empty();
test_intersect_with_empty();
test_difference_with_empty();
test_subset_with_empty();
test_in_singleton();
test_in_empty();
}