Gurobi 5.0.1 (linux64) logging started Sun Nov 18 01:38:17 2012 Optimize a model with 399 rows, 260 columns and 1255 nonzeros Presolve time: 0.00s Presolved: 399 rows, 260 columns, 1255 nonzeros Variable types: 0 continuous, 260 integer (260 binary) Found heuristic solution: objective 100.0000000 Found heuristic solution: objective 98.0000000 Root relaxation: objective 0.000000e+00, 98 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 61 98.00000 0.00000 100% - 0s H 0 0 87.0000000 0.00000 100% - 0s H 0 0 79.0000000 0.00000 100% - 0s 0 0 1.09584 0 62 79.00000 1.09584 98.6% - 0s 0 0 2.00000 0 63 79.00000 2.00000 97.5% - 0s 0 0 2.00000 0 64 79.00000 2.00000 97.5% - 0s 0 0 2.00000 0 61 79.00000 2.00000 97.5% - 0s H 0 0 77.0000000 2.00000 97.4% - 0s H 0 0 73.0000000 2.00000 97.3% - 0s 0 2 2.00000 0 61 73.00000 2.00000 97.3% - 0s * 39 39 21 58.0000000 6.67200 88.5% 37.2 0s * 75 65 21 57.0000000 6.69159 88.3% 34.0 0s * 331 279 21 56.0000000 17.28011 69.1% 31.0 0s * 334 272 20 55.0000000 17.28011 68.6% 30.8 0s * 937 489 35 54.0000000 20.87500 61.3% 29.8 1s * 1112 496 29 51.0000000 20.89239 59.0% 29.0 1s 4607 1128 46.91304 26 121 51.00000 32.54902 36.2% 24.0 5s 10746 1622 49.50000 26 121 51.00000 37.78947 25.9% 21.9 10s 18363 1349 cutoff 27 51.00000 41.40000 18.8% 20.8 15s Cutting planes: Gomory: 2 Explored 26328 nodes (521811 simplex iterations) in 19.55 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.100000000000e+01, best bound 5.100000000000e+01, gap 0.0%