current bounds on the number of colors: 0 -- 99 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:27 2012 Optimize a model with 11516 rows, 5084 columns and 39102 nonzeros Presolve removed 1 rows and 49 columns Presolve time: 0.08s Presolved: 11515 rows, 5035 columns, 39053 nonzeros Variable types: 0 continuous, 5035 integer (5035 binary) Root relaxation: objective 0.000000e+00, 259 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 (259 simplex iterations) in 0.09 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 -- 49 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:27 2012 Optimize a model with 5691 rows, 2609 columns and 19152 nonzeros Presolve removed 1 rows and 24 columns Presolve time: 0.03s Presolved: 5690 rows, 2585 columns, 19128 nonzeros Variable types: 0 continuous, 2585 integer (2585 binary) Root relaxation: objective 0.000000e+00, 232 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 (454 simplex iterations) in 0.04 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 -- 24 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:28 2012 Optimize a model with 2895 rows, 1421 columns and 9576 nonzeros Presolve removed 1 rows and 12 columns Presolve time: 0.01s Presolved: 2894 rows, 1409 columns, 9564 nonzeros Variable types: 0 continuous, 1409 integer (1409 binary) Root relaxation: objective 0.000000e+00, 212 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 (354 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 -- 12 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:28 2012 Optimize a model with 1497 rows, 827 columns and 4788 nonzeros Presolve removed 1 rows and 6 columns Presolve time: 0.00s Presolved: 1496 rows, 821 columns, 4782 nonzeros Variable types: 0 continuous, 821 integer (821 binary) Root relaxation: objective 0.000000e+00, 220 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 (369 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 18:24:28 2012 Optimize a model with 798 rows, 530 columns and 2394 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 797 rows, 527 columns, 2391 nonzeros Variable types: 0 continuous, 527 integer (527 binary) Root relaxation: objective 0.000000e+00, 254 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 0 164 - 0.00000 - - 0s 0 0 0.00000 0 136 - 0.00000 - - 0s 0 0 0.00000 0 164 - 0.00000 - - 0s 0 0 0.00000 0 166 - 0.00000 - - 0s 0 0 0.00000 0 168 - 0.00000 - - 0s 0 0 0.00000 0 179 - 0.00000 - - 0s 0 0 0.00000 0 174 - 0.00000 - - 0s 0 0 0.00000 0 172 - 0.00000 - - 0s 0 0 0.00000 0 191 - 0.00000 - - 0s 0 0 0.00000 0 191 - 0.00000 - - 0s 0 2 0.00000 0 191 - 0.00000 - - 0s Cutting planes: Zero half: 9 Explored 15 nodes (6831 simplex iterations) in 0.31 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 18:24:28 2012 Optimize a model with 1031 rows, 629 columns and 3192 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1030 rows, 625 columns, 3188 nonzeros Variable types: 0 continuous, 625 integer (625 binary) Root relaxation: objective 0.000000e+00, 227 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 (406 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% optimal solution found: number of colors: 4