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adding consequence examples

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-07-29 17:24:14 -07:00
parent 82d0310d94
commit 2263be1b4d
3 changed files with 26 additions and 1 deletions
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19
examples/c++/example.cpp
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@ -1111,6 +1111,24 @@ void param_descrs_example() {
}
}
void consequence_example() {
std::cout << "consequence example\n";
context c;
expr A = c.bool_const("a");
expr B = c.bool_const("b");
expr C = c.bool_const("c");
solver s(c);
s.add(implies(A, B));
s.add(implies(B, C));
expr_vector assumptions(c), vars(c), consequences(c);
assumptions.push_back(!C);
vars.push_back(A);
vars.push_back(B);
vars.push_back(C);
std::cout << s.consequences(assumptions, vars, consequences) << "\n";
std::cout << consequences << "\n";
}
int main() {
try {
@ -1154,6 +1172,7 @@ int main() {
extract_example(); std::cout << "\n";
param_descrs_example(); std::cout << "\n";
sudoku_example(); std::cout << "\n";
consequence_example(); std::cout << "\n";
std::cout << "done\n";
}
catch (exception & ex) {

5
src/api/c++/z3++.h
View file

@ -1723,6 +1723,11 @@ namespace z3 {
return to_check_result(r);
}
model get_model() const { Z3_model m = Z3_solver_get_model(ctx(), m_solver); check_error(); return model(ctx(), m); }
check_result consequences(expr_vector& assumptions, expr_vector& vars, expr_vector& conseq) {
Z3_lbool r = Z3_solver_get_consequences(ctx(), m_solver, assumptions, vars, conseq);
check_error();
return to_check_result(r);
}
std::string reason_unknown() const { Z3_string r = Z3_solver_get_reason_unknown(ctx(), m_solver); check_error(); return r; }
stats statistics() const { Z3_stats r = Z3_solver_get_statistics(ctx(), m_solver); check_error(); return stats(ctx(), r); }
expr_vector unsat_core() const { Z3_ast_vector r = Z3_solver_get_unsat_core(ctx(), m_solver); check_error(); return expr_vector(ctx(), r); }

3
src/smt/smt_consequences.cpp
View file

@ -25,7 +25,8 @@ namespace smt {
expr_ref_vector premises(m_manager);
uint_set::iterator it = vars.begin(), end = vars.end();
for (; it != end; ++it) {
premises.push_back(bool_var2expr(*it));
expr* e = bool_var2expr(*it);
premises.push_back(get_assignment(*it) != l_false ? e : m_manager.mk_not(e));
}
return mk_and(premises);
}