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; COMMAND-LINE: --incremental
; EXPECT: sat
; EXPECT: sat
; EXPECT: unsat
; EXPECT: sat
; EXPECT: sat
; EXPECT: unsat
; EXPECT: sat
(set-logic ALL)
(declare-fun x () Bool)
(declare-fun y () Bool)
(assert (or x y))
(check-sat)
(push 1)
(assert (not x))
(check-sat)
(push 1)
(assert (not y))
(check-sat)
(pop 1)
(check-sat)
(pop 1)
(check-sat)
(push 1)
(push 1)
(assert x)
(assert (not x))
(check-sat)
(pop 1)
(pop 1)
(check-sat)
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