зеркало из https://github.com/microsoft/ivy.git
28 строки
339 B
XML
28 строки
339 B
XML
#lang ivy1.7
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type t
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relation p(X:t)
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relation q(X:t)
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var a : t
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var b : bool
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var c : bool
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axiom p(a)
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relation r(X:t,Y:t)
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schema foo = {
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property exists Y. r(X,Y)
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}
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axiom p(X) & r(X,Y) -> q(X)
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property exists Z. q(Z)
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proof {
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property [baz] exists X. p(X) named y;
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showgoals;
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instantiate foo with X = y;
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showgoals
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}
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