Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:22:57 2012 Optimize a model with 301 rows, 220 columns and 970 nonzeros Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 301 rows, 219 columns, 969 nonzeros Variable types: 0 continuous, 219 integer (218 binary) Found heuristic solution: objective 75.0000000 Root relaxation: objective 0.000000e+00, 104 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 68 75.00000 0.00000 100% - 0s H 0 0 68.0000000 0.00000 100% - 0s H 0 0 55.0000000 0.00000 100% - 0s H 0 0 53.0000000 0.00000 100% - 0s 0 0 0.57195 0 69 53.00000 0.57195 98.9% - 0s 0 0 1.03125 0 70 53.00000 1.03125 98.1% - 0s 0 0 1.26925 0 71 53.00000 1.26925 97.6% - 0s 0 0 1.27500 0 70 53.00000 1.27500 97.6% - 0s H 0 0 34.0000000 1.27500 96.3% - 0s 0 0 1.27500 0 70 34.00000 1.27500 96.3% - 0s H 0 0 33.0000000 1.27500 96.1% - 0s 0 2 1.55000 0 70 33.00000 1.55000 95.3% - 0s H 33 27 31.0000000 2.00000 93.5% 26.7 0s * 64 49 18 30.0000000 3.94074 86.9% 29.6 0s H 556 302 28.0000000 11.83889 57.7% 23.7 0s * 598 299 18 27.0000000 12.00000 55.6% 23.6 0s Explored 1480 nodes (36355 simplex iterations) in 1.22 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0%