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Exercise 4 (Abstract Interpreter)

This is the task corresponding to exercise 4.

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Definitions File

theory Defs imports Complex_Main begin

no_notation less_eq  ("(_/ \<le> _)"  [51, 51] 50)

type_synonym vname = string

datatype aexp = N int | R rat | V vname | Plus aexp aexp

datatype Num = S | I | F | R

end

Template File

theory Submission imports Defs begin   

definition less_num :: "Num \<Rightarrow> Num \<Rightarrow> bool" ("(_/ \<le> _)"  [51, 51] 50) where
  "x \<le> y = undefined"

definition sup_num :: "Num \<Rightarrow> Num \<Rightarrow> Num" ("(_/ \<squnion> _)" [51, 51] 50) where
  "x \<squnion> y = undefined"

fun plus' :: "Num \<Rightarrow> Num \<Rightarrow> Num" where
  "plus' _ _ = undefined"

fun mul' :: "Num \<Rightarrow> Num \<Rightarrow> Num" where
  "mul' _ _ = undefined"

end

Check File

theory Check imports Submission begin

end

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