2%int63
     : int
2
     : int
9223372036854775807
     : int
427
     : int
427
     : int
427
     : int
427
     : int
427
     : int
The command has indeed failed with message:
Cannot interpret this number as a value of type int
The command has indeed failed with message:
Cannot interpret this number as a value of type int
0
     : int
0
     : int
The command has indeed failed with message:
The reference xg was not found in the current environment.
The command has indeed failed with message:
The reference xG was not found in the current environment.
The command has indeed failed with message:
The reference x1 was not found in the current environment.
The command has indeed failed with message:
The reference x was not found in the current environment.
add 2 2
     : int
The command has indeed failed with message:
Cannot interpret this number as a value of type int
The command has indeed failed with message:
overflow in int63 literal: 9223372036854775808
0x1
     : int
2
     : nat
2%int63
     : int
t = 2%i63
     : int
t = 2%i63
     : int
2
     : nat
2
     : int
(2 + 2)%int63
     : int
2 + 2
     : int
     = 4
     : int
     = 37151199385380486
     : int
     = 4
     : int
     = 4
     : int
     = 4
     : int
     = add
     : int -> int -> int
     = 12
     : int
     = 12
     : int
     = 12
     : int
     = 3 + x
     : int
     = 1 + 2 + x
     : int