Imports
VERTEX-COVER complement machine: canonical vertex-pair stream
The semantic layer identifies the reused general-CLIQUE positional-pair
generator with the exact normalized-pair sequence used by the complement map.
The range-certificate layer supplies its canonical [0, ..., |V| - 1] input
directly from the graph encoding with a fixed polynomial-time TM2. Their
composition computes the exact canonical pair stream from the original graph.