sink: "{ S[] -> a[] }"
must_source: "{ T[i] -> a[] : 2*floor((i)/2) = i and 0 <= i <= 9 }"
may_source: "{ T[i] -> a[] : 2*floor((1 + i)/2) = 1 + i and 0 <= i <= 9 }"
schedule:
  domain: "{ T[i]; S[] }"
  child:
    sequence:
    - filter: "{ T[i] }"
      child:
        schedule: "[{ T[i] -> [(i)] }]"
    - filter: "{ S[] }"