H(performed(X),T)/\H(performed(Y),T)/\X!=Y
--->false.

H(performed(X),TX)/\H(performed(Y),TY)/\TY==TX+1
--->EN(performed(Z),TZ)/\TZ>TX/\TZ<TY.

H(start,0)
--->E(performed(a0),Ta0)
/\E(performed(a0),Ta0_1)/\Ta0_1>Ta0
/\E(performed(a0),Ta0_2)/\Ta0_2>Ta0_1.

H(performed(a0),Ta0)
--->E(performed(a1),Ta1)/\Ta1==Ta0+1.

H(performed(a1),Ta1)
--->E(performed(a2),Ta2)/\Ta2==Ta1+1.

H(performed(a2),Ta2)
--->E(performed(a3),Ta3)/\Ta3==Ta2+1.

H(performed(a3),Ta3)
/\H(performed(a3),Ta3_1)/\Ta3_1>Ta3
--->EN(performed(a3),Ta3_2)/\Ta3_2>Ta3_1.