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Optimize calls to Z3_eval_smtlib2_string (#6422)

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* Allow reseting the stream of smt2::scanner

* Put the parser of parse_smt2_commands in the cmd_context

* Move parser streams to cmd_context

* Move parser fields from cmd_context to api::context

* Move forward declarations from cmd_context.h to api_context.h

* Change parse_smt2_commands_with_parser to use *& instead of **

* Add tests for Z3_eval_smtlib2_string

* Don't reuse the streams in Z3_eval_smtlib2_string

* Fix indentation

* Add back unnecessary deleted line

Co-authored-by: Nuno Lopes <nuno.lopes@tecnico.ulisboa.pt>
This commit is contained in:
Facundo Domínguez 2022-10-28 17:57:22 -03:00 • committed by GitHub
parent a409a4a677
commit 91cdc082c4
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GPG key ID: 4AEE18F83AFDEB23
8 changed files with 154 additions and 9 deletions
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96
src/test/smt2print_parse.cpp
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@ -64,6 +64,98 @@ void test_parseprint(char const* spec) {
Z3_del_context(ctx);
}
void test_eval(Z3_context ctx, Z3_string spec, bool shouldFail) {
std::cout << "spec:\n" << spec << "\n";
Z3_string resp;
bool failed = false;
try {
resp = Z3_eval_smtlib2_string(ctx, spec);
}
catch (std::runtime_error& e) {
resp = e.what();
failed = true;
}
std::cout << "response:\n" << resp << "\n";
if (shouldFail != failed) {
if (shouldFail)
throw std::runtime_error("should have failed");
else
throw std::runtime_error("should have succeeded");
}
}
void throwError(Z3_context c, Z3_error_code e) {
throw std::runtime_error(Z3_get_error_msg(c, e));
}
void test_repeated_eval() {
// Z3_eval_smtlib2_string reuses the parser and the scanner
// when called repeteadly on the same context.
//
// These tests rehearse that earlier calls do not interfere
// with the result of later calls if the SMT queries are independent.
char const* spec1 =
"(push)\n"
"(declare-datatypes (T) ((list (nil) (cons (car T) (cdr list)))))\n"
"(declare-const x Int)\n"
"(declare-const l (list Int))\n"
"(declare-fun f ((list Int)) Bool)\n"
"(assert (f (cons x l)))\n"
"(check-sat)\n"
"(pop)\n";
char const* spec2 =
"(push)\n"
"(declare-const a (Array Int Int))\n"
"(declare-const b (Array (Array Int Int) Bool))\n"
"(assert (select b a))\n"
"(assert (= b ((as const (Array (Array Int Int) Bool)) true)))\n"
"(assert (= b (store b a true)))\n"
"(declare-const b1 (Array Bool Bool))\n"
"(declare-const b2 (Array Bool Bool))\n"
"(assert (= ((as const (Array Bool Bool)) false) ((_ map and) b1 b2)))\n"
"(check-sat)\n"
"(pop)\n";
char const* spec3 =
"(push)\n"
"(declare-const a@ (Array Int Int))\n"
"(declare-const b (Array (Array Int Int) Bool))\n"
"(assert (select b a))\n"
"(check-sat)\n"
"(pop)\n";
char const* spec4 =
"(push)\n"
"(declare-const a (Array Int Int))\n"
"(declare-const b# (Array (Array Int Int) Bool))\n"
"(assert (select b a))\n"
"(check-sat)\n"
"(pop)\n";
Z3_context ctx = Z3_mk_context(nullptr);
Z3_set_error_handler(ctx, throwError);
std::cout << "testing Z3_eval_smtlib2_string\n";
test_eval(ctx, spec1, false);
std::cout << "successful call after successful call\n";
test_eval(ctx, spec2, false);
std::cout << "failing call after successful call\n";
test_eval(ctx, spec3, true);
std::cout << "failing call after failing call\n";
test_eval(ctx, spec4, true);
std::cout << "successful call after failing call\n";
test_eval(ctx, spec1, false);
std::cout << "done evaluating\n";
Z3_del_context(ctx);
}
void tst_smt2print_parse() {
// test basic datatypes
@ -126,6 +218,8 @@ void tst_smt2print_parse() {
test_parseprint(spec6);
// Test ?
// Test ?
test_repeated_eval();
}