(* Title: HOL/Quickcheck_Examples/Quickcheck_Lattice_Examples.thy
Author: Lukas Bulwahn
Copyright 2010 TU Muenchen
*)
theory Quickcheck_Lattice_Examples
imports Main
begin
declare [[quickcheck_finite_type_size=5]]
text \<open>We show how other default types help to find counterexamples to propositions if
the standard default type \<^typ>\<open>int\<close> is insufficient.\<close>
unbundle lattice_syntax
declare [[quickcheck_narrowing_active = false, quickcheck_timeout = 3600]]
subsection \<open>Distributive lattices\<close>
lemma sup_inf_distrib2:
"((y :: 'a :: distrib_lattice) \ z) \ x = (y \ x) \ (z \ x)"
quickcheck [expect = no_counterexample]
by (simp add: inf_sup_aci sup_inf_distrib1)
lemma sup_inf_distrib2_1:
"((y :: 'a :: lattice) \ z) \ x = (y \ x) \ (z \ x)"
quickcheck [expect = counterexample]
oops
lemma sup_inf_distrib2_2:
"((y :: 'a :: distrib_lattice) \ z') \ x = (y \ x) \ (z \ x)"
quickcheck [expect = counterexample]
oops
lemma inf_sup_distrib1_1:
"(x :: 'a :: distrib_lattice) \ (y \ z) = (x \ y) \ (x' \ z)"
quickcheck [expect = counterexample]
oops
lemma inf_sup_distrib2_1:
"((y :: 'a :: distrib_lattice) \ z) \ x = (y \ x) \ (y \ x)"
quickcheck [expect = counterexample]
oops
subsection \<open>Bounded lattices\<close>
lemma inf_bot_left [simp]:
"\ \ (x :: 'a :: bounded_lattice_bot) = \"
quickcheck [expect = no_counterexample]
by (rule inf_absorb1) simp
lemma inf_bot_left_1:
"\ \ (x :: 'a :: bounded_lattice_bot) = x"
quickcheck [expect = counterexample]
oops
lemma inf_bot_left_2:
"y \ (x :: 'a :: bounded_lattice_bot) = \"
quickcheck [expect = counterexample]
oops
lemma inf_bot_left_3:
"x \ \ ==> y \ (x :: 'a :: bounded_lattice_bot) \ \"
quickcheck [expect = counterexample]
oops
lemma inf_bot_right [simp]:
"(x :: 'a :: bounded_lattice_bot) \ \ = \"
quickcheck [expect = no_counterexample]
by (rule inf_absorb2) simp
lemma inf_bot_right_1:
"x \ \ ==> (x :: 'a :: bounded_lattice_bot) \ \ = y"
quickcheck [expect = counterexample]
oops
lemma inf_bot_right_2:
"(x :: 'a :: bounded_lattice_bot) \ \ ~= \"
quickcheck [expect = counterexample]
oops
lemma sup_bot_right [simp]:
"(x :: 'a :: bounded_lattice_bot) \ \ = \"
quickcheck [expect = counterexample]
oops
lemma sup_bot_left [simp]:
"\ \ (x :: 'a :: bounded_lattice_bot) = x"
quickcheck [expect = no_counterexample]
by (rule sup_absorb2) simp
lemma sup_bot_right_2 [simp]:
"(x :: 'a :: bounded_lattice_bot) \ \ = x"
quickcheck [expect = no_counterexample]
by (rule sup_absorb1) simp
lemma sup_eq_bot_iff [simp]:
"(x :: 'a :: bounded_lattice_bot) \ y = \ \ x = \ \ y = \"
quickcheck [expect = no_counterexample]
by (simp add: eq_iff)
lemma sup_top_left [simp]:
"\ \ (x :: 'a :: bounded_lattice_top) = \"
quickcheck [expect = no_counterexample]
by (rule sup_absorb1) simp
lemma sup_top_right [simp]:
"(x :: 'a :: bounded_lattice_top) \ \ = \"
quickcheck [expect = no_counterexample]
by (rule sup_absorb2) simp
lemma inf_top_left [simp]:
"\ \ x = (x :: 'a :: bounded_lattice_top)"
quickcheck [expect = no_counterexample]
by (rule inf_absorb2) simp
lemma inf_top_right [simp]:
"x \ \ = (x :: 'a :: bounded_lattice_top)"
quickcheck [expect = no_counterexample]
by (rule inf_absorb1) simp
lemma inf_eq_top_iff [simp]:
"(x :: 'a :: bounded_lattice_top) \ y = \ \ x = \ \ y = \"
quickcheck [expect = no_counterexample]
by (simp add: eq_iff)
unbundle no lattice_syntax
end
quality 100%
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