z3-z3-4.13.0.src.test.get_implied_equalities.cpp Maven / Gradle / Ivy
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/*++
Copyright (c) 2015 Microsoft Corporation
--*/
#include "api/z3.h"
#include "util/trace.h"
#include "util/debug.h"
static Z3_ast mk_var(Z3_context ctx, char const* name, Z3_sort s) {
return Z3_mk_const(ctx, Z3_mk_string_symbol(ctx, name), s);
}
static Z3_ast mk_int_var(Z3_context ctx, char const* name) {
return mk_var(ctx, name, Z3_mk_int_sort(ctx));
}
static void tst_get_implied_equalities1() {
Z3_config cfg = Z3_mk_config();
Z3_context ctx = Z3_mk_context(cfg);
Z3_del_config(cfg);
Z3_sort int_ty = Z3_mk_int_sort(ctx);
Z3_ast a = mk_int_var(ctx,"a");
Z3_ast b = mk_int_var(ctx,"b");
Z3_ast c = mk_int_var(ctx,"c");
Z3_ast d = mk_int_var(ctx,"d");
Z3_func_decl f = Z3_mk_func_decl(ctx, Z3_mk_string_symbol(ctx,"f"), 1, &int_ty, int_ty);
Z3_ast fa = Z3_mk_app(ctx, f, 1, &a);
Z3_ast fb = Z3_mk_app(ctx, f, 1, &b);
Z3_ast fc = Z3_mk_app(ctx, f, 1, &c);
unsigned const num_terms = 7;
unsigned i;
Z3_ast terms[7] = { a, b, c, d, fa, fb, fc };
unsigned class_ids[7] = { 0, 0, 0, 0, 0, 0, 0 };
Z3_solver solver = Z3_mk_simple_solver(ctx);
Z3_solver_inc_ref(ctx, solver);
Z3_solver_assert(ctx, solver, Z3_mk_eq(ctx, a, b));
Z3_solver_assert(ctx, solver, Z3_mk_eq(ctx, b, d));
Z3_solver_assert(ctx, solver, Z3_mk_le(ctx, fa, fc));
Z3_solver_assert(ctx, solver, Z3_mk_le(ctx, fc, d));
Z3_get_implied_equalities(ctx, solver, num_terms, terms, class_ids);
for (i = 0; i < num_terms; ++i) {
printf("Class %s |-> %d\n", Z3_ast_to_string(ctx, terms[i]), class_ids[i]);
}
ENSURE(class_ids[1] == class_ids[0]);
ENSURE(class_ids[2] != class_ids[0]);
ENSURE(class_ids[3] == class_ids[0]);
ENSURE(class_ids[4] != class_ids[0]);
ENSURE(class_ids[5] != class_ids[0]);
ENSURE(class_ids[6] != class_ids[0]);
ENSURE(class_ids[4] == class_ids[5]);
printf("asserting b <= f(a)\n");
Z3_solver_assert(ctx, solver, Z3_mk_le(ctx, b, fa));
Z3_get_implied_equalities(ctx, solver, num_terms, terms, class_ids);
for (i = 0; i < num_terms; ++i) {
printf("Class %s |-> %d\n", Z3_ast_to_string(ctx, terms[i]), class_ids[i]);
}
ENSURE(class_ids[1] == class_ids[0]);
ENSURE(class_ids[2] != class_ids[0]);
ENSURE(class_ids[3] == class_ids[0]);
ENSURE(class_ids[4] == class_ids[0]);
ENSURE(class_ids[5] == class_ids[0]);
ENSURE(class_ids[6] == class_ids[0]);
Z3_solver_dec_ref(ctx, solver);
/* delete logical context */
Z3_del_context(ctx);
}
static void tst_get_implied_equalities2() {
//enable_trace("after_search");
//enable_trace("get_implied_equalities");
//enable_trace("implied_equalities");
Z3_config cfg = Z3_mk_config();
Z3_context ctx = Z3_mk_context(cfg);
Z3_del_config(cfg);
Z3_solver solver = Z3_mk_simple_solver(ctx);
Z3_solver_inc_ref(ctx, solver);
Z3_sort int_ty = Z3_mk_int_sort(ctx);
Z3_ast a = mk_int_var(ctx,"a");
Z3_ast b = mk_int_var(ctx,"b");
Z3_ast one = Z3_mk_numeral(ctx, "1", int_ty);
Z3_ast two = Z3_mk_numeral(ctx, "2", int_ty);
Z3_ast x = Z3_mk_const_array(ctx, int_ty, one);
Z3_ast y = Z3_mk_store(ctx, x, one, a);
Z3_ast z = Z3_mk_store(ctx, y, two , b);
Z3_ast u = Z3_mk_store(ctx, x, two , b);
Z3_ast v = Z3_mk_store(ctx, u, one , a);
unsigned const num_terms = 5;
unsigned i;
Z3_ast terms[5] = { x, y, z, u, v};
unsigned class_ids[5] = { 0, 0, 0, 0, 0};
Z3_get_implied_equalities(ctx, solver, num_terms, terms, class_ids);
for (i = 0; i < num_terms; ++i) {
printf("Class %s |-> %d\n", Z3_ast_to_string(ctx, terms[i]), class_ids[i]);
}
ENSURE(class_ids[1] != class_ids[0]);
ENSURE(class_ids[2] != class_ids[0]);
ENSURE(class_ids[3] != class_ids[0]);
ENSURE(class_ids[4] != class_ids[0]);
ENSURE(class_ids[4] == class_ids[2]);
ENSURE(class_ids[2] != class_ids[1]);
ENSURE(class_ids[3] != class_ids[1]);
ENSURE(class_ids[4] != class_ids[1]);
ENSURE(class_ids[3] != class_ids[2]);
/* delete logical context */
Z3_solver_dec_ref(ctx, solver);
Z3_del_context(ctx);
}
void tst_get_implied_equalities() {
tst_get_implied_equalities1();
tst_get_implied_equalities2();
}