Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:34:53 2012 Optimize a model with 598 rows, 148 columns and 1196 nonzeros Presolve removed 141 rows and 0 columns Presolve time: 0.00s Presolved: 457 rows, 148 columns, 1010 nonzeros Variable types: 0 continuous, 148 integer (148 binary) Found heuristic solution: objective 42.0000000 Root relaxation: objective 5.900000e+01, 302 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 59.00000 0 110 42.00000 59.00000 40.5% - 0s 0 0 58.50000 0 140 42.00000 58.50000 39.3% - 0s H 0 0 44.0000000 58.50000 33.0% - 0s 0 0 57.85247 0 145 44.00000 57.85247 31.5% - 0s 0 0 57.21827 0 147 44.00000 57.21827 30.0% - 0s H 0 0 45.0000000 57.21827 27.2% - 0s 0 0 56.90868 0 147 45.00000 56.90868 26.5% - 0s 0 0 56.63095 0 144 45.00000 56.63095 25.8% - 0s 0 0 56.08689 0 143 45.00000 56.08689 24.6% - 0s H 0 0 46.0000000 56.08689 21.9% - 0s 0 0 56.02324 0 143 46.00000 56.02324 21.8% - 0s H 0 0 47.0000000 56.02324 19.2% - 0s 0 0 55.89669 0 146 47.00000 55.89669 18.9% - 0s 0 0 55.83108 0 143 47.00000 55.83108 18.8% - 0s 0 0 55.77982 0 147 47.00000 55.77982 18.7% - 0s 0 0 55.77584 0 147 47.00000 55.77584 18.7% - 0s 0 0 55.77584 0 146 47.00000 55.77584 18.7% - 0s H 0 0 49.0000000 55.77584 13.8% - 0s 0 2 55.77527 0 146 49.00000 55.77527 13.8% - 0s H 49 23 50.0000000 55.30185 10.6% 41.8 0s Cutting planes: Gomory: 1 Clique: 1 Zero half: 130 Explored 1023 nodes (33906 simplex iterations) in 1.30 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0%