Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:59:15 2012 Optimize a model with 309 rows, 179 columns and 949 nonzeros Presolve time: 0.00s Presolved: 309 rows, 179 columns, 949 nonzeros Variable types: 0 continuous, 179 integer (179 binary) Found heuristic solution: objective 75.0000000 Root relaxation: objective 0.000000e+00, 54 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 25 75.00000 0.00000 100% - 0s H 0 0 69.0000000 0.00000 100% - 0s 0 0 1.23429 0 27 69.00000 1.23429 98.2% - 0s 0 0 1.25172 0 41 69.00000 1.25172 98.2% - 0s 0 0 1.29643 0 42 69.00000 1.29643 98.1% - 0s 0 0 1.35255 0 42 69.00000 1.35255 98.0% - 0s 0 0 1.35255 0 42 69.00000 1.35255 98.0% - 0s 0 0 1.37714 0 30 69.00000 1.37714 98.0% - 0s 0 0 1.40804 0 45 69.00000 1.40804 98.0% - 0s 0 0 1.40855 0 42 69.00000 1.40855 98.0% - 0s 0 0 1.43541 0 43 69.00000 1.43541 97.9% - 0s 0 0 1.49143 0 28 69.00000 1.49143 97.8% - 0s 0 0 1.49143 0 27 69.00000 1.49143 97.8% - 0s 0 0 1.50993 0 44 69.00000 1.50993 97.8% - 0s 0 0 1.51864 0 55 69.00000 1.51864 97.8% - 0s 0 0 1.63422 0 52 69.00000 1.63422 97.6% - 0s 0 0 1.74857 0 29 69.00000 1.74857 97.5% - 0s 0 0 1.74857 0 29 69.00000 1.74857 97.5% - 0s 0 0 1.74857 0 29 69.00000 1.74857 97.5% - 0s 0 0 1.74857 0 29 69.00000 1.74857 97.5% - 0s 0 2 1.78571 0 29 69.00000 1.78571 97.4% - 0s * 39 25 18 68.0000000 9.38776 86.2% 26.9 0s * 42 21 16 67.0000000 9.38776 86.0% 25.0 0s * 95 56 17 66.0000000 14.61111 77.9% 26.8 0s * 216 133 16 65.0000000 21.50000 66.9% 27.7 0s * 232 135 16 63.0000000 22.33333 64.6% 27.3 0s * 236 131 15 62.0000000 22.33333 64.0% 27.0 0s * 246 129 15 60.0000000 22.33333 62.8% 26.2 0s * 1098 200 24 59.0000000 32.85714 44.3% 24.9 0s * 4058 110 24 58.0000000 48.37500 16.6% 20.5 2s Cutting planes: Gomory: 1 Mod-K: 5 Explored 4506 nodes (90023 simplex iterations) in 2.78 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.800000000000e+01, best bound 5.800000000000e+01, gap 0.0%