Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:51:42 2012 Optimize a model with 615 rows, 114 columns and 1230 nonzeros Presolve removed 219 rows and 0 columns Presolve time: 0.00s Presolved: 396 rows, 114 columns, 982 nonzeros Variable types: 0 continuous, 114 integer (114 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 4.063614e+01, 277 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40.63614 0 113 28.00000 40.63614 45.1% - 0s H 0 0 30.0000000 40.63614 35.5% - 0s 0 0 40.09398 0 113 30.00000 40.09398 33.6% - 0s 0 0 40.02759 0 113 30.00000 40.02759 33.4% - 0s H 0 0 31.0000000 40.02759 29.1% - 0s 0 0 39.77997 0 112 31.00000 39.77997 28.3% - 0s H 0 0 32.0000000 39.77997 24.3% - 0s 0 0 39.63517 0 109 32.00000 39.63517 23.9% - 0s 0 0 39.50131 0 111 32.00000 39.50131 23.4% - 0s 0 0 39.42495 0 111 32.00000 39.42495 23.2% - 0s 0 0 39.38587 0 113 32.00000 39.38587 23.1% - 0s 0 0 39.37106 0 113 32.00000 39.37106 23.0% - 0s 0 0 39.34476 0 112 32.00000 39.34476 23.0% - 0s 0 0 39.30775 0 113 32.00000 39.30775 22.8% - 0s 0 0 39.24992 0 111 32.00000 39.24992 22.7% - 0s 0 0 39.21981 0 113 32.00000 39.21981 22.6% - 0s 0 0 39.20949 0 114 32.00000 39.20949 22.5% - 0s 0 0 39.14889 0 113 32.00000 39.14889 22.3% - 0s H 0 0 33.0000000 39.14889 18.6% - 0s 0 0 39.10135 0 111 33.00000 39.10135 18.5% - 0s 0 0 38.98815 0 113 33.00000 38.98815 18.1% - 0s 0 0 38.90770 0 112 33.00000 38.90770 17.9% - 0s 0 0 38.87748 0 112 33.00000 38.87748 17.8% - 0s 0 0 38.84295 0 112 33.00000 38.84295 17.7% - 0s 0 0 38.78713 0 113 33.00000 38.78713 17.5% - 0s 0 0 38.76783 0 112 33.00000 38.76783 17.5% - 0s H 0 0 34.0000000 38.76783 14.0% - 0s 0 0 38.76460 0 111 34.00000 38.76460 14.0% - 0s 0 0 38.71750 0 111 34.00000 38.71750 13.9% - 0s 0 0 38.69531 0 112 34.00000 38.69531 13.8% - 0s 0 0 38.69391 0 112 34.00000 38.69391 13.8% - 0s 0 0 38.69391 0 112 34.00000 38.69391 13.8% - 0s 0 2 38.69173 0 112 34.00000 38.69173 13.8% - 0s Cutting planes: Zero half: 58 Explored 263 nodes (9476 simplex iterations) in 0.49 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.400000000000e+01, best bound 3.400000000000e+01, gap 0.0%