current bounds on the number of colors: 0 -- 102 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:59 2012 Optimize a model with 12495 rows, 5445 columns and 42381 nonzeros Presolve removed 1 rows and 51 columns Presolve time: 0.09s Presolved: 12494 rows, 5394 columns, 42330 nonzeros Variable types: 0 continuous, 5394 integer (5394 binary) Root relaxation: objective 0.000000e+00, 292 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 0.12 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 -- 51 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:00 2012 Optimize a model with 6177 rows, 2793 columns and 20775 nonzeros Presolve removed 1 rows and 25 columns Presolve time: 0.03s Presolved: 6176 rows, 2768 columns, 20750 nonzeros Variable types: 0 continuous, 2768 integer (2768 binary) Root relaxation: objective 0.000000e+00, 253 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 (423 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 -- 25 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:00 2012 Optimize a model with 3018 rows, 1467 columns and 9972 nonzeros Presolve removed 1 rows and 12 columns Presolve time: 0.01s Presolved: 3017 rows, 1455 columns, 9960 nonzeros Variable types: 0 continuous, 1455 integer (1455 binary) Root relaxation: objective 0.000000e+00, 215 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 (385 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 18:25:00 2012 Optimize a model with 1560 rows, 855 columns and 4986 nonzeros Presolve removed 1 rows and 6 columns Presolve time: 0.00s Presolved: 1559 rows, 849 columns, 4980 nonzeros Variable types: 0 continuous, 849 integer (849 binary) Root relaxation: objective 0.000000e+00, 236 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 (394 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 18:25:00 2012 Optimize a model with 831 rows, 549 columns and 2493 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 830 rows, 546 columns, 2490 nonzeros Variable types: 0 continuous, 546 integer (546 binary) Root relaxation: objective 0.000000e+00, 242 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 0 168 - 0.00000 - - 0s 0 0 0.00000 0 176 - 0.00000 - - 0s 0 0 0.00000 0 182 - 0.00000 - - 0s 0 0 0.00000 0 236 - 0.00000 - - 0s 0 0 0.00000 0 181 - 0.00000 - - 0s 0 0 0.00000 0 172 - 0.00000 - - 0s 0 0 0.00000 0 155 - 0.00000 - - 0s 0 0 0.00000 0 148 - 0.00000 - - 0s 0 0 0.00000 0 160 - 0.00000 - - 0s 0 0 0.00000 0 203 - 0.00000 - - 0s 0 0 0.00000 0 178 - 0.00000 - - 0s 0 2 0.00000 0 177 - 0.00000 - - 0s Cutting planes: Zero half: 17 Explored 13 nodes (8437 simplex iterations) in 0.42 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 18:25:00 2012 Optimize a model with 1074 rows, 651 columns and 3324 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1073 rows, 647 columns, 3320 nonzeros Variable types: 0 continuous, 647 integer (647 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 (598 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