U11 tt V2 U12 isNat activate V2 U12 tt tt U21 tt tt U31 tt N activate N U41 tt M N U42 isNat activate N activate M activate N U42 tt M N s plus activate N activate M isNat n__0 tt isNat n__plus V1 V2 U11 isNat activate V1 activate V2 isNat n__s V1 U21 isNat activate V1 plus N 0 U31 isNat N N plus N s M U41 isNat M M N 0 n__0 plus X1 X2 n__plus X1 X2 s X n__s X activate n__0 0 activate n__plus X1 X2 plus X1 X2 activate n__s X s X activate X X 2.2 U42 tt M N plus activate N activate M isNat n__s V1 isNat activate V1 U41 tt M N isNat activate N plus N s M isNat M plus N 0 isNat N isNat n__plus V1 V2 activate V1 isNat n__plus V1 V2 isNat activate V1 U41 tt M N U42 isNat activate N activate M activate N U41 tt M N activate N isNat n__plus V1 V2 activate V2 U11 tt V2 isNat activate V2 isNat n__s V1 activate V1 plus N 0 U31 isNat N N isNat n__s V1 U21 isNat activate V1 isNat n__plus V1 V2 U11 isNat activate V1 activate V2 U31 tt N activate N activate n__s X s X U11 tt V2 U12 isNat activate V2 activate n__0 0 U11 tt V2 activate V2 U41 tt M N activate N U42 tt M N activate N U42 tt M N s plus activate N activate M plus N s M U41 isNat M M N U41 tt M N activate M U42 tt M N activate M activate n__plus X1 X2 plus X1 X2 true activate n__plus X1 X2 plus X1 X2 isNat n__plus V1 V2 activate V2 U42 tt M N activate M U41 tt M N activate N U41 tt M N activate M U41 tt M N U42 isNat activate N activate M activate N plus N s M U41 isNat M M N isNat n__plus V1 V2 isNat activate V1 U42 tt M N activate N isNat n__plus V1 V2 activate V1 U41 tt M N activate N U11 tt V2 activate V2 plus N 0 isNat N plus N s M isNat M U41 tt M N isNat activate N isNat n__s V1 isNat activate V1 U31 tt N activate N isNat n__plus V1 V2 U11 isNat activate V1 activate V2 plus N 0 U31 isNat N N isNat n__s V1 activate V1 U42 tt M N plus activate N activate M U11 tt V2 isNat activate V2 true 0 0 0 U21 1 1 4 U11 2 20823 s 1 1 3 isNat 1 1 0 U42 3 2 3 6 activate 1 1 0 plus 2 1 2 2 activate 1 1 0 U12 1 20824 n__s 1 1 3 U42 3 2 3 3 U12 1 0 0 0 1 s 1 0 n__plus 2 1 2 3 n__0 0 1 isNat 1 1 20819 plus 2 1 2 3 U11 2 2 1 U31 2 2 0 U41 3 2 3 4 U21 1 0 tt 0 20825 U41 3 2 3 6 U31 2 2 2 activate X X U31 tt N activate N activate n__0 0 activate n__plus X1 X2 plus X1 X2 activate n__s X s X U41 tt M N U42 isNat activate N activate M activate N plus N 0 U31 isNat N N s X n__s X 0 n__0 plus N s M U41 isNat M M N plus X1 X2 n__plus X1 X2 U42 tt M N s plus activate N activate M U42 tt M N s plus activate N activate M false isNat n__s V1 U21 isNat activate V1 false U11 tt V2 U12 isNat activate V2 false activate n__s X s X false activate n__0 0 false NaTT certifiable-1.6