if
true
t
e
t
if
false
t
e
e
member
x
nil
false
member
x
cons
y
ys
if
eq
x
y
true
member
x
ys
eq
nil
nil
true
eq
O
x
0
y
eq
x
y
eq
0
x
1
y
false
eq
1
x
0
y
false
eq
1
x
1
y
eq
x
y
negate
0
x
1
x
negate
1
x
0
x
choice
cons
x
xs
x
choice
cons
x
xs
choice
xs
guess
nil
nil
guess
cons
clause
cnf
cons
choice
clause
guess
cnf
verify
nil
true
verify
cons
l
ls
if
member
negate
l
ls
false
verify
ls
sat
cnf
satck
cnf
guess
cnf
satck
cnf
assign
if
verify
assign
assign
unsat
if
3
true
0
false
0
member
2
nil
0
cons
2
eq
2
O
1
0
1
1
1
negate
1
choice
1
guess
1
verify
1
sat
1
satck
2
unsat
0
INNERMOST
tct_complexity/TCT_12/sat.trs