fixed inverted splitting criterion: only split rarely occurring seeds
fixed inverted splitting criterion: only split rarely occurring seeds

[git-p4: depot-paths = "//sw/gpgpu/nvbio/main/": change = 18330477]

NVlabs/nvbio,kimrutherford/nvbio,NVlabs/nvbio,kimrutherford/nvbio,NVlabs/nvbio,NVlabs/nvbio,kimrutherford/nvbio,kimrutherford/nvbio