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// RUN: %boogie -typeEncoding:n -logPrefix:0n "%s" > "%t"
// RUN: %diff "%s.n.expect" "%t"
// RUN: %boogie -typeEncoding:p -logPrefix:0p "%s" > "%t"
// RUN: %diff "%s.p.expect" "%t"
// RUN: %boogie -typeEncoding:a -logPrefix:0a "%s" > "%t"
// RUN: %diff "%s.a.expect" "%t"
// Example from the Boogie 2 language report
type Wicket;
const unique a: Wicket extends complete;
const unique b: Wicket;
const unique c: Wicket extends a, b complete;
const unique d: Wicket extends c;
const unique e: Wicket;
procedure P() returns () {
assert !(exists x:Wicket :: a <: x && a != x);
assert (forall x:Wicket :: x <: a ==> x == a || x <: c);
assert c <: b && !(exists x:Wicket :: c <: x && x <: b && x != c && x != b);
assert !(b <: a) && !(b <: c);
assert c <: a && c <: b && d <: c;
assert (forall x:Wicket :: c <: x ==> c==x || a <: x || b <: x);
assert (forall x:Wicket :: x <: c ==> c==x || x <: d);
assert d <: c;
assert !(a <: d) && !(b <: d) && !(c <: d);
assert false; // unprovable
}
procedure Q() returns () {
assert (forall x:Wicket :: x <: b && x != b ==> x <: c); // unprovable
assert !(exists x:Wicket :: b <: x && b != x); // unprovable
}
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