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Proof step 6 from proof abs-nodes-unique-strong-h (previous step)

abs-nodes(buf, m, [], [], false), ∀ buf0, m, x0, lax0, x1, lax1, boolvar1. # buf0 < # buf → abs-nodes(buf0, m, x0, lax0, false) → (abs-nodes(buf0, m, x1, lax1, boolvar1) ↔ x0 = x1 ∧ lax0 = lax1) ⊦ abs-nodes(buf, m, x1, lax1, boolvar1) ↔ [] = x1 ∧ [] = lax1

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 7:
⊦ abs-nodes(buf, m, [], lax, weak) ↔ # buf = 0 ∧ lax = [] ∨ (∃ buf0, buf1. buf = buf0 + buf1 ∧ abs-padding(buf0) ∧ abs-nodes(buf1, m + # buf0, [], lax, weak)) ∨ weak ∧ abs-failed(buf) ∧ lax = []
Proof step 8:
# buf = 0 ∧ [] = [] ∨ (∃ buf0, buf1. buf = buf0 + buf1 ∧ abs-padding(buf0) ∧ abs-nodes(buf1, m + # buf0, [], [], false)) ∨ false ∧ abs-failed(buf) ∧ [] = [], ∀ buf0, m, x0, lax0, x1, lax1, boolvar1. # buf0 < # buf → abs-nodes(buf0, m, x0, lax0, false) → (abs-nodes(buf0, m, x1, lax1, boolvar1) ↔ x0 = x1 ∧ lax0 = lax1) ⊦ abs-nodes(buf, m, x1, lax1, boolvar1) ↔ [] = x1 ∧ [] = lax1

Rule argument

spec: <toplevel> name: abs-nodes-base seq: ⊦ abs-nodes(buf, m, [], lax, weak) ↔ # buf = 0 ∧ lax = [] ∨ (∃ buf0, buf1. buf = buf0 + buf1 ∧ abs-padding(buf0) ∧ abs-nodes(buf1, m + # buf0, [], lax, weak)) ∨ weak ∧ abs-failed(buf) ∧ lax = [] subst: [weak, lax, m, buf] → [false, [], m, buf] flags: <all paths>

Additional information

Used terms: false, [], m, buf