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Implement Z3_optimize_translate for context translation (#8072)

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* Initial plan

* Implement Z3_optimize_translate functionality

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Fix compilation errors and add tests for optimize translate

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Revert changes to opt_solver.cpp as requested

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
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Copilot 2025-12-13 05:12:08 +00:00 • committed by GitHub
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54
src/test/api.cpp
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@ -107,8 +107,62 @@ static void test_mk_distinct() {
}
void test_optimize_translate() {
Z3_config cfg1 = Z3_mk_config();
Z3_context ctx1 = Z3_mk_context(cfg1);
Z3_del_config(cfg1);
// Create optimization context in first context
Z3_optimize opt1 = Z3_mk_optimize(ctx1);
Z3_optimize_inc_ref(ctx1, opt1);
// Add some constraints
Z3_sort int_sort = Z3_mk_int_sort(ctx1);
Z3_symbol x_sym = Z3_mk_string_symbol(ctx1, "x");
Z3_ast x = Z3_mk_const(ctx1, x_sym, int_sort);
Z3_ast zero = Z3_mk_int(ctx1, 0, int_sort);
Z3_ast constraint = Z3_mk_gt(ctx1, x, zero); // x > 0
Z3_optimize_assert(ctx1, opt1, constraint);
// Add an objective to maximize x
Z3_optimize_maximize(ctx1, opt1, x);
// Create second context
Z3_config cfg2 = Z3_mk_config();
Z3_context ctx2 = Z3_mk_context(cfg2);
Z3_del_config(cfg2);
// Translate optimize context to second context
Z3_optimize opt2 = Z3_optimize_translate(ctx1, opt1, ctx2);
Z3_optimize_inc_ref(ctx2, opt2);
// Check sat in the translated context
Z3_lbool result = Z3_optimize_check(ctx2, opt2, 0, nullptr);
ENSURE(result == Z3_L_TRUE);
// Verify we can get assertions from translated context
Z3_ast_vector assertions = Z3_optimize_get_assertions(ctx2, opt2);
unsigned num_assertions = Z3_ast_vector_size(ctx2, assertions);
ENSURE(num_assertions == 1);
// Verify we can get objectives from translated context
Z3_ast_vector objectives = Z3_optimize_get_objectives(ctx2, opt2);
unsigned num_objectives = Z3_ast_vector_size(ctx2, objectives);
ENSURE(num_objectives == 1);
// Clean up
Z3_optimize_dec_ref(ctx2, opt2);
Z3_optimize_dec_ref(ctx1, opt1);
Z3_del_context(ctx2);
Z3_del_context(ctx1);
}
void tst_api() {
test_apps();
test_bvneg();
test_mk_distinct();
test_optimize_translate();
}