Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:59:03 2012 Optimize a model with 303 rows, 176 columns and 931 nonzeros Presolve time: 0.00s Presolved: 303 rows, 176 columns, 931 nonzeros Variable types: 0 continuous, 176 integer (176 binary) Found heuristic solution: objective 75.0000000 Found heuristic solution: objective 74.0000000 Root relaxation: objective 0.000000e+00, 56 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 74.00000 0.00000 100% - 0s H 0 0 69.0000000 0.00000 100% - 0s H 0 0 68.0000000 0.00000 100% - 0s 0 0 0.96595 0 39 68.00000 0.96595 98.6% - 0s 0 0 0.97776 0 40 68.00000 0.97776 98.6% - 0s 0 0 1.01701 0 41 68.00000 1.01701 98.5% - 0s 0 0 1.09033 0 48 68.00000 1.09033 98.4% - 0s 0 0 1.22179 0 42 68.00000 1.22179 98.2% - 0s 0 0 1.26060 0 43 68.00000 1.26060 98.1% - 0s 0 0 1.26400 0 30 68.00000 1.26400 98.1% - 0s 0 0 1.34400 0 28 68.00000 1.34400 98.0% - 0s 0 0 1.34400 0 28 68.00000 1.34400 98.0% - 0s 0 0 1.38400 0 30 68.00000 1.38400 98.0% - 0s 0 0 1.40136 0 53 68.00000 1.40136 97.9% - 0s 0 0 1.45599 0 44 68.00000 1.45599 97.9% - 0s 0 0 1.48996 0 55 68.00000 1.48996 97.8% - 0s 0 0 1.56154 0 41 68.00000 1.56154 97.7% - 0s 0 0 1.65209 0 45 68.00000 1.65209 97.6% - 0s 0 0 1.70017 0 55 68.00000 1.70017 97.5% - 0s 0 0 1.71547 0 46 68.00000 1.71547 97.5% - 0s 0 0 1.72859 0 75 68.00000 1.72859 97.5% - 0s 0 2 1.73303 0 75 68.00000 1.73303 97.5% - 0s * 33 27 20 67.0000000 8.68000 87.0% 32.2 0s * 34 23 19 66.0000000 8.68000 86.8% 31.3 0s * 58 42 15 63.0000000 8.75000 86.1% 32.1 0s * 330 151 16 62.0000000 21.17500 65.8% 26.3 0s H 2627 487 61.0000000 39.66667 35.0% 21.0 1s * 4589 600 29 60.0000000 45.00000 25.0% 19.8 2s Explored 8235 nodes (149138 simplex iterations) in 4.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+01, best bound 6.000000000000e+01, gap 0.0%