Add benchmark script and instances

infinity/benchmark/2row-cont/fiber.pre.log

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+[      0.00] multirow (git-4d20687d04e75dc63c7bb84cbbfeb2261c6a6ab2)
+[      0.00] mf-hpc-1-1.local 2017-03-11 22:40
+[      0.00] Compile-time parameters:
+[      0.00]     EPSILON: 1.000000e-08
+[      0.00]     GREEDY_BIG_E: 1.000000e+03
+[      0.00]     GREEDY_MAX_GAP: 1.000000e-04
+[      0.00] Command line arguments:
+[      0.00]     ../build/infinity.run --mir --greedy --problem instances/fiber.pre.mps.gz --basis bases/fiber.pre.bas --log 2row-cont/fiber.pre.log --stats 2row-cont/fiber.pre.yaml --solution solutions/fiber.pre.x 
+[      0.00]     290 rows, 1086 cols
+[      0.00] Storing column types...
+[      0.00] Relaxing integrality...
+[      0.00] Disabling presolve...
+[      0.00] Optimizing...
+[      0.00]     opt = 198107.357500
+[      0.00] Reading tableau rows...
+[      0.01] Adding MIR cuts...
+[      0.01]     opt = 204446.877500
+[      0.01]     opt = 209780.997500
+[      0.01]     opt = 217619.939074
+[      0.01]     opt = 220492.258796
+[      0.01]     opt = 223475.778796
+[      0.01]     opt = 223559.322796
+[      0.01]     opt = 223657.178796
+[      0.01]     opt = 227241.058621
+[      0.01]     opt = 227513.849067
+[      0.01]     opt = 229999.338519
+[      0.01]     opt = 235855.564671
+[      0.01]     opt = 275131.350730
+[      0.01]     opt = 306825.530082
+[      0.01]     opt = 344210.561379
+[      0.01] Optimizing...
+[      0.01]     opt = 344210.561379
+[      0.01] Adding greedy intersection cuts (2 rows)...
+[      0.01]     Finding combinations...
+[      0.02]         1406 combinations [0.05]
+[      1.90]     opt = 344263.418159
+[      1.93]     opt = 346902.306174
+[      1.94]     opt = 346903.496807
+[      2.12] Optimizing...
+[      2.12]     opt = 346903.496807
+[      2.12] Writing stats to file 2row-cont/fiber.pre.yaml...