[Imprint][Data Privacy Statement][E-Mail]

View long theorem info. View the proof. Back to main index. View the specification. View theorem base summary, View theorem base listing, the used properties by spec, the dependency list, the symbol table,

Proof step 13 from proof hexbyte-byte (previous step)

1 = # str0 ⊦ str0 = "", char ' + str0 = "", i2b(16 * hexchar(char) + hex(str0.rstring) + hexchar(str0.char1)) = i2b(hexchar(char) * 16 + hexchar(str0.char1))

Heuristic elimination applied rule insert elim lemma

And closed the goal!

Rule argument

spec: string-data inst: name: elim seq: ⊦ str ≠ "" → (char = str.char1 ∧ str0 = str.rstring ↔ str = char + str0) subst: [str, char0, str0] → [str0, char0, str] flags:

Additional information

Used simplifier rules: hex-empty: ⊦ hex("") = 0;% ⊦ i * j = j * i;% ⊦ char + str = char ' + str;% ⊦ #(char ' + str) = # str + 1;% ⊦ (str1 + str2) + str3 = str1 + str2 + str3;% ⊦ 1 = m + 1 ↔ m = 0;% ⊦ # str = 0 ↔ str = "";% ⊦ (m + n0) + n1 = m + n0 + n1;% ⊦ m + n = n + m;% ⊦ str1 + str2 = "" ↔ str1 = "" ∧ str2 = "";% ⊦ char ' ≠ "";% ⊦ (* i0) * i + i = (i0 + 1) * i;% ⊦ i * j * j0 = (i * j) * j0;% ⊦ i + j + i0 = (i + j) + i0;% ⊦ i + j = j + i;% ⊦ i + 0 = i;%⊦ str ≠ "" → (char = str.char1 ∧ str0 = str.rstring ↔ str = char + str0); (elim) Used terms: str0, char0, str