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Proof step 4 from proof fill-rec-one (previous step)

# [] < n → fillsgn(n, boolvar ' + []) = mklist(boolvar, n - # []) + [] ⊦ fillsgn(n, boolvar ') = mklist(boolvar, n), n = 0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
fillsgn(n, boolvar ') = mklist(boolvar, n - 0) ⊦ mklist(boolvar, n - 0) = mklist(boolvar, n), n = 0

Rule argument

Additional information

Used simplifier rules: ⊦ (bits + bits0) + bits1 = bits + bits0 + bits1;% ⊦ bits + [] = bits;% ⊦ 0 < n ↔ n ≠ 0;% ⊦ # [] = 0;