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### Definitions File

### Template File

### Check File

theory Defs imports "HOL-IMP.VCG" begin definition "POWER2 ≡ ''x'' ::= N 1;; WHILE Less (N 0) (V ''n'') DO ( ''x'' ::= Plus (V ''x'') (V ''x'');; ''n'' ::= Plus (V ''n'') (N (-1)) )" end

theory Submission imports Defs begin theorem POWER2_correct: "⊢ {λs. s ''n'' = n ∧ n ≥ 0} POWER2 {λs. s ''x'' = 2 ^ nat n}" sorry text ‹Please specify your table in some textual format here:› text ‹ › end

theory Check imports Submission begin theorem POWER2_correct: "⊢ {λs. s ''n'' = n ∧ n ≥ 0} POWER2 {λs. s ''x'' = 2 ^ nat n}" by (rule Submission.POWER2_correct) end

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