current bounds on the number of colors: 0 -- 158 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:07:41 2012 Optimize a model with 48822 rows, 13098 columns and 158474 nonzeros Presolve time: 0.16s Presolved: 48822 rows, 13098 columns, 158474 nonzeros Variable types: 0 continuous, 13098 integer (13098 binary) Root relaxation: objective 0.000000e+00, 550 iterations, 0.04 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 (932 simplex iterations) in 0.28 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 -- 79 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:07:42 2012 Optimize a model with 24182 rows, 6778 columns and 78234 nonzeros Presolve time: 0.13s Presolved: 24182 rows, 6778 columns, 78234 nonzeros Variable types: 0 continuous, 6778 integer (6778 binary) Root relaxation: objective 0.000000e+00, 441 iterations, 0.02 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 (755 simplex iterations) in 0.18 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 -- 39 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:07:43 2012 Optimize a model with 11862 rows, 3618 columns and 38114 nonzeros Presolve time: 0.04s Presolved: 11862 rows, 3618 columns, 38114 nonzeros Variable types: 0 continuous, 3618 integer (3618 binary) Root relaxation: objective 0.000000e+00, 338 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 (617 simplex iterations) in 0.07 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:07:43 2012 Optimize a model with 5702 rows, 2038 columns and 18054 nonzeros Presolve time: 0.02s Presolved: 5702 rows, 2038 columns, 18054 nonzeros Variable types: 0 continuous, 2038 integer (2038 binary) Root relaxation: objective 0.000000e+00, 343 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 (751 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:07:43 2012 Optimize a model with 2622 rows, 1248 columns and 8024 nonzeros Presolve time: 0.01s Presolved: 2622 rows, 1248 columns, 8024 nonzeros Variable types: 0 continuous, 1248 integer (1248 binary) Root relaxation: objective 0.000000e+00, 350 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 0 286 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 0s 0 0 0.00000 0 266 - 0.00000 - - 0s 0 0 0.00000 0 266 - 0.00000 - - 1s 0 0 0.00000 0 262 - 0.00000 - - 1s 0 0 0.00000 0 262 - 0.00000 - - 1s 0 0 0.00000 0 262 - 0.00000 - - 1s 0 2 0.00000 0 262 - 0.00000 - - 1s 607 62 0.00000 31 279 - 0.00000 - 53.3 5s 614 67 0.00000 8 239 - 0.00000 - 52.6 10s * 835 2 40 0.0000000 0.00000 0.0% 95.6 12s Cutting planes: Gomory: 2 Zero half: 7 Explored 836 nodes (99138 simplex iterations) in 12.72 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:07:56 2012 Optimize a model with 1390 rows, 932 columns and 4012 nonzeros Presolve removed 158 rows and 158 columns Presolve time: 0.00s Presolved: 1232 rows, 774 columns, 3696 nonzeros Variable types: 0 continuous, 774 integer (774 binary) Root relaxation: objective 0.000000e+00, 163 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 0 158 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (647 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:07:56 2012 Optimize a model with 2006 rows, 1090 columns and 6018 nonzeros Presolve time: 0.01s Presolved: 2006 rows, 1090 columns, 6018 nonzeros Variable types: 0 continuous, 1090 integer (1090 binary) Root relaxation: objective 0.000000e+00, 361 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 0 310 - 0.00000 - - 0s 0 0 0.00000 0 316 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3240 simplex iterations) in 0.28 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4