theorem :: GFACIRC1:72

for x, y, z being set st z <> [<*x,y*>,xor2c] & x <> [<*y,z*>,and2a] & y <> [<*z,x*>,and2] & z <> [<*x,y*>,and2c] holds
for s being State of (BitGFA1Circ (x,y,z)) holds Following (s,2) is stable