llvm/polly/lib/External/isl/test_inputs/convex10.polylib

3 4
1 54 1 -4
1 2 -1 58
1 0 -1 6

4 4
1 54 1 -4
1 2 -1 58
1 0 1 -7
1 -4 1 0

4 4
1  54    1   -4
1   2   -1   58
1   0   -1  116
1   0    0    1