Gurobi 5.0.1 (linux64) logging started Tue Nov 20 14:31:36 2012 Optimize a model with 905 rows, 190 columns and 1810 nonzeros Presolve removed 205 rows and 0 columns Presolve time: 0.00s Presolved: 700 rows, 190 columns, 1540 nonzeros Variable types: 0 continuous, 190 integer (190 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 7.550000e+01, 336 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 75.50000 0 149 51.00000 75.50000 48.0% - 0s 0 0 74.26519 0 185 51.00000 74.26519 45.6% - 0s 0 0 72.78286 0 184 51.00000 72.78286 42.7% - 0s H 0 0 55.0000000 72.78286 32.3% - 0s 0 0 72.24128 0 185 55.00000 72.24128 31.3% - 0s H 0 0 57.0000000 72.24128 26.7% - 0s 0 0 71.79759 0 186 57.00000 71.79759 26.0% - 0s 0 0 71.43475 0 186 57.00000 71.43475 25.3% - 0s 0 0 71.23600 0 189 57.00000 71.23600 25.0% - 0s 0 0 71.15644 0 186 57.00000 71.15644 24.8% - 0s 0 0 70.88077 0 185 57.00000 70.88077 24.4% - 0s 0 0 70.74389 0 185 57.00000 70.74389 24.1% - 0s 0 0 70.69053 0 186 57.00000 70.69053 24.0% - 0s 0 0 70.67799 0 186 57.00000 70.67799 24.0% - 0s 0 0 70.67799 0 183 57.00000 70.67799 24.0% - 0s 0 2 70.67604 0 183 57.00000 70.67604 24.0% - 0s H 27 25 59.0000000 70.67162 19.8% 67.2 0s H 139 63 61.0000000 69.69771 14.3% 55.2 0s 609 259 62.66129 12 187 61.00000 67.57794 10.8% 56.2 5s 619 266 67.27550 7 186 61.00000 67.57794 10.8% 55.3 10s H 1009 345 62.0000000 67.57794 9.00% 65.5 14s 1053 337 63.92991 21 153 62.00000 67.57794 9.00% 64.8 15s 2309 405 64.25000 31 138 62.00000 65.37014 5.44% 56.7 20s Cutting planes: Gomory: 1 Clique: 1 Zero half: 214 Explored 3773 nodes (187801 simplex iterations) in 23.97 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.200000000000e+01, best bound 6.200000000000e+01, gap 0.0%