bcba3569ed
- ais.ept: tests inclusion of array types into structure types - ce.ept: constant propagation - contract.ept: contract constructs - contract_automaton.ept: contract constructs and automata
42 lines
621 B
Plaintext
42 lines
621 B
Plaintext
node f(x : bool) returns (y : bool)
|
|
|
|
contract
|
|
var c, cx : bool;
|
|
let
|
|
c = not y;
|
|
cx = not (x & false fby x);
|
|
tel
|
|
assume cx
|
|
enforce c
|
|
|
|
let
|
|
automaton
|
|
state A do y = x unless x then B
|
|
state B do y = false fby x until x then A
|
|
end
|
|
tel
|
|
|
|
node g(x : bool) returns (y : bool)
|
|
|
|
contract
|
|
var ok : bool;
|
|
let
|
|
automaton
|
|
state No_x do ok = true until x then One_x
|
|
state One_x do ok = not x
|
|
until x then Error
|
|
| not x then One_no_x
|
|
state One_no_x do ok = not x
|
|
until x then Error
|
|
| not x then No_x
|
|
state Error do ok = false
|
|
end
|
|
tel
|
|
assume ok
|
|
enforce not y
|
|
|
|
let
|
|
y = f(x);
|
|
tel
|
|
|