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Proof step 63 from proof test (previous step)

buf1 = mk(mkarray(2), 2, 0, 0) ⊦ ⟪put#(0, a; buf1 .data)⟫ ⟪buf1 := buf1 .len:= (buf1 .len + 1)⟫ ⟪push#(b; buf1) ; pop#(; buf1, a0) ; assert#(a0 = a) ; push#(c; buf1) ; pop#(; buf1, a0) ; assert#(a0 = b) ; pop#(; buf1, a0) ; assert#(a0 = c)⟫ true

Heuristic weak unfold applied rule call right

And obtained the following new goals

Proof step 62:
buf1 = mk(mkarray(2), 2, 0, 0) ⊦ ⟪ar := buf1 .data, a1 := a, i := 0⟫ ⟪if 0 ≤ i ∧ i < n→i(# ar) then ar := ar[i→n(i), a1] else abort⟫ ⟪buf1 := buf1 .data:= ar .len:= ((buf1 .data:= ar) .len + 1)⟫ ⟪push#(b; buf1) ; pop#(; buf1, a0) ; assert#(a0 = a) ; push#(c; buf1) ; pop#(; buf1, a0) ; assert#(a0 = b) ; pop#(; buf1, a0) ; assert#(a0 = c)⟫ true

Rule argument

[fmapos-arg: pos: right 1]

Additional information

[[CONCRETESIMPRULES : ([CSIMPDECL : put# (i, a; ar) { if 0 ≤ i ∧ i < n→i(# ar) then ar := ar[i→n(i), a] else abort }])]]