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function {:existential true} b1():bool;
function {:existential true} b2():bool;
function {:existential true} b3():bool;
function {:existential true} b4():bool;
function {:existential true} b5():bool;
function {:existential true} b6():bool;
function {:existential true} b7():bool;
function {:existential true} b8():bool;
function {:existential true} Assert(): bool;
var array:[int]int;
procedure foo (i:int)
requires b6() || i < 0;
requires b5() || i == 0;
requires b2() || i > 0;
ensures b3() || array[i] > 0;
modifies array;
ensures Assert() || (forall x:int :: {array[x]} x == i || array[x] == old(array)[x]);
{
array[i] := 2 * i;
}
procedure bar (j:int) returns (result:int)
requires b8() || j < 0;
requires b7() || j == 0;
requires b4() || j > 0;
modifies array;
ensures Assert() || (forall x:int :: {array[x]} (x == j) || array[x] == old(array)[x]);
ensures b1() || array[j] == old(array)[j];
{
call foo(j);
result := array[j];
}
var p:int;
procedure main() returns (result: int)
modifies array;
{
call result:= bar(p);
}
// expected assigment: Assert -> false, bi->true forall i
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