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const {:existential true} b1:bool;
const {:existential true} b2:bool;
const {:existential true} b3: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 fooVar!=5;
// expected outcome: Errors
// expected assigment: b1->True,b2->True,b3->True
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