current bounds on the number of colors: 0 -- 102 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:02 2012 Optimize a model with 12903 rows, 5453 columns and 43605 nonzeros Presolve removed 1 rows and 51 columns Presolve time: 0.09s Presolved: 12902 rows, 5402 columns, 43554 nonzeros Variable types: 0 continuous, 5402 integer (5402 binary) Root relaxation: objective 0.000000e+00, 234 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 (234 simplex iterations) in 0.10 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 18:25:02 2012 Optimize a model with 6377 rows, 2801 columns and 21375 nonzeros Presolve removed 1 rows and 25 columns Presolve time: 0.03s Presolved: 6376 rows, 2776 columns, 21350 nonzeros Variable types: 0 continuous, 2776 integer (2776 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 (420 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 18:25:02 2012 Optimize a model with 3114 rows, 1475 columns and 10260 nonzeros Presolve removed 1 rows and 12 columns Presolve time: 0.01s Presolved: 3113 rows, 1463 columns, 10248 nonzeros Variable types: 0 continuous, 1463 integer (1463 binary) Root relaxation: objective 0.000000e+00, 209 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 (351 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 18:25:02 2012 Optimize a model with 1608 rows, 863 columns and 5130 nonzeros Presolve removed 1 rows and 6 columns Presolve time: 0.00s Presolved: 1607 rows, 857 columns, 5124 nonzeros Variable types: 0 continuous, 857 integer (857 binary) Root relaxation: objective 0.000000e+00, 237 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 (376 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 18:25:02 2012 Optimize a model with 855 rows, 557 columns and 2565 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 854 rows, 554 columns, 2562 nonzeros Variable types: 0 continuous, 554 integer (554 binary) Root relaxation: objective 0.000000e+00, 247 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 0 161 - 0.00000 - - 0s 0 0 0.00000 0 144 - 0.00000 - - 0s 0 0 0.00000 0 170 - 0.00000 - - 0s 0 0 0.00000 0 180 - 0.00000 - - 0s 0 0 0.00000 0 158 - 0.00000 - - 0s 0 0 0.00000 0 204 - 0.00000 - - 0s 0 0 0.00000 0 121 - 0.00000 - - 0s 0 0 0.00000 0 153 - 0.00000 - - 0s 0 0 0.00000 0 217 - 0.00000 - - 0s 0 0 0.00000 0 202 - 0.00000 - - 0s 0 0 0.00000 0 218 - 0.00000 - - 0s 0 0 0.00000 0 218 - 0.00000 - - 0s 0 2 0.00000 0 218 - 0.00000 - - 0s Cutting planes: Zero half: 22 Explored 15 nodes (10376 simplex iterations) in 0.52 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 18:25:03 2012 Optimize a model with 1106 rows, 659 columns and 3420 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1105 rows, 655 columns, 3416 nonzeros Variable types: 0 continuous, 655 integer (655 binary) Root relaxation: objective 0.000000e+00, 252 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 (593 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