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Theorem bytes2int-zero-03
⊦ by ≠ i2b(0) ∧ by ∈ bytes → bytes2int(bytes) ≠ 0
Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by:
bytes2int-len-one-02
,
bytes2int-zero-06
,
Used by units in proved state:
Proof exists?: Yes
View
the proof
Infos about the proof
Proved?: Yes
Interactions: 9
Proof steps: 16
Used lemmas:
bytes2int-one
,
bytes2int-rec-01
,
Used spec theorems:
byte
/
band-ff
int-basic2
/
not-zero-pos
int-mult
/
modzero-01
Used simplifier rules:
int-abs
/
anti
byte
/
ubyte-max-01
int-abs
/
forward-lels
int-abs
/
forward-le-05
int-abs
/
forward-le-04
nat-basic2
/
s
nat-basic1
/
ref-1
int-mult
/
zero-neq-01
int-basic2
/
add-zero
byte
/
ubyte-zero-01
byte
/
ubyte-zero
int-basic2
/
add-c
int-basic2
/
add-a
int-mult
/
commutativity
int-mult
/
associativity
int-abs
/
lels
int-mult
/
zero-gr
list
/bytelist/
in-17
list
/bytelist/
in-append
list
/bytelist/
e-02
nat-basic2
/
c
nat-basic2
/
a
nat-basic2
/
one
list
/bytelist/
a
list
/bytelist/
len
list-last
/bytelist/
last-elim
nat-basic1
/
one
list-data
/bytelist/
l
list
/bytelist/
in-empty
list
/bytelist/
onein
list
/bytelist/
len-02
list
/bytelist/
e
byte
/
byte-equal-01