Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:51:02 2012 Optimize a model with 621 rows, 112 columns and 1242 nonzeros Presolve removed 206 rows and 0 columns Presolve time: 0.00s Presolved: 415 rows, 112 columns, 1005 nonzeros Variable types: 0 continuous, 112 integer (112 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 4.016352e+01, 272 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40.16352 0 109 26.00000 40.16352 54.5% - 0s H 0 0 29.0000000 40.16352 38.5% - 0s 0 0 39.45898 0 109 29.00000 39.45898 36.1% - 0s 0 0 39.04503 0 106 29.00000 39.04503 34.6% - 0s 0 0 38.80667 0 110 29.00000 38.80667 33.8% - 0s 0 0 38.64730 0 112 29.00000 38.64730 33.3% - 0s 0 0 38.55409 0 111 29.00000 38.55409 32.9% - 0s 0 0 38.49528 0 109 29.00000 38.49528 32.7% - 0s 0 0 38.40915 0 112 29.00000 38.40915 32.4% - 0s 0 0 38.36971 0 110 29.00000 38.36971 32.3% - 0s H 0 0 30.0000000 38.36971 27.9% - 0s 0 0 38.25615 0 110 30.00000 38.25615 27.5% - 0s 0 0 38.16515 0 112 30.00000 38.16515 27.2% - 0s 0 0 38.12359 0 112 30.00000 38.12359 27.1% - 0s 0 0 38.10831 0 112 30.00000 38.10831 27.0% - 0s 0 0 38.10831 0 112 30.00000 38.10831 27.0% - 0s 0 2 38.10802 0 112 30.00000 38.10802 27.0% - 0s H 45 27 31.0000000 37.76020 21.8% 35.2 0s * 97 39 13 32.0000000 37.34240 16.7% 33.1 0s * 383 57 7 33.0000000 35.50000 7.58% 29.0 0s Cutting planes: Clique: 1 Zero half: 60 Explored 498 nodes (14133 simplex iterations) in 0.59 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.300000000000e+01, best bound 3.300000000000e+01, gap 0.0%