current bounds on the number of colors: 0 -- 110 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:59 2012 Optimize a model with 17105 rows, 6359 columns and 57035 nonzeros Presolve time: 0.12s Presolved: 17105 rows, 6359 columns, 57035 nonzeros Variable types: 0 continuous, 6359 integer (6359 binary) Root relaxation: objective 0.000000e+00, 286 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (469 simplex iterations) in 0.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 55 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:59 2012 Optimize a model with 8453 rows, 3279 columns and 27999 nonzeros Presolve time: 0.04s Presolved: 8453 rows, 3279 columns, 27999 nonzeros Variable types: 0 continuous, 3279 integer (3279 binary) Root relaxation: objective 0.000000e+00, 281 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (482 simplex iterations) in 0.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 27 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:59 2012 Optimize a model with 4127 rows, 1739 columns and 13481 nonzeros Presolve time: 0.01s Presolved: 4127 rows, 1739 columns, 13481 nonzeros Variable types: 0 continuous, 1739 integer (1739 binary) Root relaxation: objective 0.000000e+00, 222 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (392 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 13 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:59 2012 Optimize a model with 1964 rows, 969 columns and 6222 nonzeros Presolve time: 0.01s Presolved: 1964 rows, 969 columns, 6222 nonzeros Variable types: 0 continuous, 969 integer (969 binary) Root relaxation: objective 0.000000e+00, 246 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (452 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:59 2012 Optimize a model with 1037 rows, 639 columns and 3111 nonzeros Presolve time: 0.00s Presolved: 1037 rows, 639 columns, 3111 nonzeros Variable types: 0 continuous, 639 integer (639 binary) Root relaxation: objective 0.000000e+00, 260 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 206 - 0.00000 - - 0s 0 0 0.00000 0 200 - 0.00000 - - 0s 0 0 0.00000 0 212 - 0.00000 - - 0s 0 0 0.00000 0 273 - 0.00000 - - 0s 0 0 0.00000 0 198 - 0.00000 - - 0s 0 0 0.00000 0 200 - 0.00000 - - 0s 0 0 0.00000 0 192 - 0.00000 - - 0s 0 0 0.00000 0 192 - 0.00000 - - 0s 0 0 0.00000 0 192 - 0.00000 - - 0s 0 2 0.00000 0 190 - 0.00000 - - 0s Cutting planes: Zero half: 21 Explored 9 nodes (8896 simplex iterations) in 0.54 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:27:00 2012 Optimize a model with 1346 rows, 749 columns and 4148 nonzeros Presolve time: 0.00s Presolved: 1346 rows, 749 columns, 4148 nonzeros Variable types: 0 continuous, 749 integer (749 binary) Root relaxation: objective 0.000000e+00, 279 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1294 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% optimal solution found: number of colors: 4