Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:23:29 2012 Optimize a model with 307 rows, 224 columns and 989 nonzeros Presolve time: 0.00s Presolved: 307 rows, 224 columns, 989 nonzeros Variable types: 0 continuous, 224 integer (224 binary) Found heuristic solution: objective 74.0000000 Root relaxation: objective 0.000000e+00, 112 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 70 74.00000 0.00000 100% - 0s H 0 0 60.0000000 0.00000 100% - 0s H 0 0 58.0000000 0.00000 100% - 0s 0 0 0.50000 0 71 58.00000 0.50000 99.1% - 0s H 0 0 56.0000000 0.50000 99.1% - 0s 0 0 0.61615 0 73 56.00000 0.61615 98.9% - 0s H 0 0 51.0000000 0.61615 98.8% - 0s 0 0 0.69218 0 75 51.00000 0.69218 98.6% - 0s 0 0 0.70017 0 76 51.00000 0.70017 98.6% - 0s H 0 0 42.0000000 0.70017 98.3% - 0s 0 0 0.72362 0 73 42.00000 0.72362 98.3% - 0s 0 0 0.72362 0 74 42.00000 0.72362 98.3% - 0s 0 0 0.72362 0 73 42.00000 0.72362 98.3% - 0s H 0 0 41.0000000 0.72362 98.2% - 0s 0 2 0.72941 0 73 41.00000 0.72941 98.2% - 0s * 41 32 26 30.0000000 2.54525 91.5% 23.5 0s * 64 41 13 29.0000000 2.64706 90.9% 25.5 0s * 93 51 14 28.0000000 5.66176 79.8% 25.0 0s Explored 1497 nodes (32289 simplex iterations) in 1.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.800000000000e+01, best bound 2.800000000000e+01, gap 0.0%