Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:37:33 2012 Optimize a model with 630 rows, 153 columns and 1260 nonzeros Presolve removed 129 rows and 0 columns Presolve time: 0.00s Presolved: 501 rows, 153 columns, 1083 nonzeros Variable types: 0 continuous, 153 integer (153 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 6.279545e+01, 325 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 62.79545 0 149 46.00000 62.79545 36.5% - 0s H 0 0 47.0000000 62.79545 33.6% - 0s H 0 0 48.0000000 62.79545 30.8% - 0s 0 0 61.45725 0 149 48.00000 61.45725 28.0% - 0s 0 0 60.73865 0 149 48.00000 60.73865 26.5% - 0s H 0 0 49.0000000 60.73865 24.0% - 0s 0 0 60.01708 0 151 49.00000 60.01708 22.5% - 0s 0 0 59.38832 0 148 49.00000 59.38832 21.2% - 0s 0 0 59.10774 0 150 49.00000 59.10774 20.6% - 0s 0 0 58.87103 0 152 49.00000 58.87103 20.1% - 0s 0 0 58.73239 0 151 49.00000 58.73239 19.9% - 0s 0 0 58.59631 0 151 49.00000 58.59631 19.6% - 0s 0 0 58.44298 0 152 49.00000 58.44298 19.3% - 0s 0 0 58.34761 0 152 49.00000 58.34761 19.1% - 0s 0 0 58.25119 0 150 49.00000 58.25119 18.9% - 0s 0 0 58.21977 0 152 49.00000 58.21977 18.8% - 0s 0 0 58.21977 0 152 49.00000 58.21977 18.8% - 0s H 0 0 50.0000000 58.21977 16.4% - 0s 0 2 58.21653 0 152 50.00000 58.21653 16.4% - 0s H 54 21 51.0000000 57.91436 13.6% 44.3 0s H 162 45 52.0000000 57.01605 9.65% 47.6 0s 614 111 54.19653 13 152 52.00000 55.40659 6.55% 42.8 5s 1125 143 cutoff 28 52.00000 55.19417 6.14% 46.8 10s Cutting planes: Zero half: 198 Explored 1599 nodes (69680 simplex iterations) in 10.97 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.200000000000e+01, best bound 5.200000000000e+01, gap 0.0%