current bounds on the number of colors: 0 -- 97 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:04 2012 Optimize a model with 12721 rows, 4919 columns and 42528 nonzeros Presolve removed 1 rows and 48 columns Presolve time: 0.08s Presolved: 12720 rows, 4871 columns, 42480 nonzeros Variable types: 0 continuous, 4871 integer (4871 binary) Root relaxation: objective 0.000000e+00, 280 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 (453 simplex iterations) in 0.11 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 -- 48 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:05 2012 Optimize a model with 6409 rows, 2591 columns and 21264 nonzeros Presolve removed 1 rows and 24 columns Presolve time: 0.03s Presolved: 6408 rows, 2567 columns, 21240 nonzeros Variable types: 0 continuous, 2567 integer (2567 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 (406 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 18:24:05 2012 Optimize a model with 3253 rows, 1427 columns and 10632 nonzeros Presolve removed 1 rows and 12 columns Presolve time: 0.01s Presolved: 3252 rows, 1415 columns, 10620 nonzeros Variable types: 0 continuous, 1415 integer (1415 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 (396 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 18:24:05 2012 Optimize a model with 1675 rows, 845 columns and 5316 nonzeros Presolve removed 1 rows and 6 columns Presolve time: 0.00s Presolved: 1674 rows, 839 columns, 5310 nonzeros Variable types: 0 continuous, 839 integer (839 binary) Root relaxation: objective 0.000000e+00, 219 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 (364 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 18:24:05 2012 Optimize a model with 886 rows, 554 columns and 2658 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 885 rows, 551 columns, 2655 nonzeros Variable types: 0 continuous, 551 integer (551 binary) Root relaxation: objective 0.000000e+00, 225 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 0 172 - 0.00000 - - 0s 0 0 0.00000 0 180 - 0.00000 - - 0s 0 0 0.00000 0 184 - 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 0 167 - 0.00000 - - 0s 0 0 0.00000 0 140 - 0.00000 - - 0s 0 0 0.00000 0 213 - 0.00000 - - 0s 0 0 0.00000 0 167 - 0.00000 - - 0s 0 0 0.00000 0 190 - 0.00000 - - 0s 0 0 0.00000 0 190 - 0.00000 - - 0s 0 2 0.00000 0 190 - 0.00000 - - 0s Cutting planes: Zero half: 27 Explored 13 nodes (9375 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 18:24:06 2012 Optimize a model with 1149 rows, 651 columns and 3544 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1148 rows, 647 columns, 3540 nonzeros Variable types: 0 continuous, 647 integer (647 binary) Root relaxation: objective 0.000000e+00, 224 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 (573 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