Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:39:23 2013 Optimize a model with 320 rows, 11350 columns and 122190 nonzeros Presolve removed 10 rows and 250 columns Presolve time: 0.27s Presolved: 310 rows, 11100 columns, 112190 nonzeros Variable types: 11010 continuous, 90 integer (90 binary) Root relaxation: objective 1.791602e+04, 192 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 17916.0191 0 21 - 17916.0191 - - 0s 0 0 17916.2335 0 21 - 17916.2335 - - 0s 0 0 17916.2822 0 21 - 17916.2822 - - 0s 0 0 17916.3553 0 21 - 17916.3553 - - 0s 0 0 17916.3553 0 21 - 17916.3553 - - 0s 0 2 17917.5091 0 21 - 17917.5091 - - 1s * 66 47 53 18037.911948 17919.2442 0.66% 4.3 2s H 68 44 18033.309402 17919.2442 0.63% 4.2 2s * 96 63 23 18032.851853 17922.5487 0.61% 4.2 2s * 112 38 15 17984.416499 17922.9108 0.34% 4.0 2s * 124 40 18 17984.347195 17923.2364 0.34% 3.9 2s Cutting planes: Flow cover: 3 Explored 205 nodes (1335 simplex iterations) in 2.59 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.798434719519e+04, best bound 1.798370176958e+04, gap 0.0036%