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function {:existential true} b1():bool;
function {:existential true} b2():bool;
function {:existential true} b3():bool;
function {:existential true} Assert(): bool;
var fooVar: int;
var xVar: int;
procedure foo()
modifies fooVar;
modifies xVar;
ensures b1() || fooVar==0;
ensures b3() || xVar<0;
{
fooVar:=5;
call bar();
}
procedure bar();
modifies xVar;
requires Assert() || fooVar!=5;
// expected assigment: Assert->true,b1->True,b2->false,b3->True
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