irreflexive [
             ((X.rf) & intra_gl_raw[X]) .
             (((X.R) -> (X.W)) & gl_fence_raw[X] - X.sloc) .
             ((X.co) & intra_cta_raw[X]) .
             (((X.W) -> (X.R)) & cta_fence_raw[X] - X.sloc) .
             ((fr[X]) & intra_gl_raw[X])
            ]
