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Proof step 13 from proof sgn-ex (previous step)

boolvar ' + bits = mklist(boolvar, n) + sgn(boolvar ' + bits) ⊦ ∃ n. boolvar ' + boolvar ' + bits = mklist(boolvar, n) + sgn(boolvar ' + bits), ¬ boolvar ∈ sgn(boolvar ' + bits) ∧ n = 0

User applied rule exists right

And closed the goal!

Rule argument

pos: right 1 terms: n + 1 abort: F discard: F computed: F

Additional information

Used simplifier rules: ⊦ mklist(boolvar, m + n) = mklist(boolvar, m) + mklist(boolvar, n);% ⊦ mklist(boolvar, 1) = boolvar ';% ⊦ mklist(boolvar, n) + boolvar ' = boolvar ' + mklist(boolvar, n);% ⊦ (bits + bits0) + bits1 = bits + bits0 + bits1;% ⊦ (m + n0) + n1 = m + n0 + n1;% ⊦ m + n = n + m;% ⊦ bits + bits0 = bits + bits1 ↔ bits0 = bits1; Used terms: n + 1