Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:38:20 2012 Optimize a model with 347 rows, 252 columns and 1117 nonzeros Presolve time: 0.00s Presolved: 347 rows, 252 columns, 1117 nonzeros Variable types: 0 continuous, 252 integer (252 binary) Found heuristic solution: objective 84.0000000 Root relaxation: objective 0.000000e+00, 115 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 79 84.00000 0.00000 100% - 0s H 0 0 70.0000000 0.00000 100% - 0s H 0 0 59.0000000 0.00000 100% - 0s 0 0 0.68278 0 81 59.00000 0.68278 98.8% - 0s H 0 0 57.0000000 0.68278 98.8% - 0s 0 0 0.69045 0 82 57.00000 0.69045 98.8% - 0s H 0 0 56.0000000 0.69045 98.8% - 0s 0 0 0.73648 0 81 56.00000 0.73648 98.7% - 0s 0 0 0.75885 0 81 56.00000 0.75885 98.6% - 0s H 0 0 55.0000000 0.75885 98.6% - 0s 0 0 0.75885 0 81 55.00000 0.75885 98.6% - 0s 0 0 0.75885 0 81 55.00000 0.75885 98.6% - 0s H 0 0 52.0000000 0.75885 98.5% - 0s 0 2 0.77352 0 81 52.00000 0.77352 98.5% - 0s * 43 43 23 51.0000000 3.59490 93.0% 31.0 0s * 51 46 27 49.0000000 3.59490 92.7% 27.2 0s * 93 66 26 40.0000000 3.67677 90.8% 23.6 0s * 169 94 12 32.0000000 5.11846 84.0% 25.1 0s * 171 89 13 31.0000000 5.11846 83.5% 25.1 0s Explored 3179 nodes (74157 simplex iterations) in 2.99 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%