f tt x f eq x half double x s x eq s x s y eq x y eq 0 0 tt double s x s s double x double 0 0 half s s x s half x half 0 0 f 2 tt 0 eq 2 half 1 double 1 s 1 0 0 FULL TRS//AProVE_10/halfdouble.trs