current bounds on the number of colors: 0 -- 155 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:57:17 2012 Optimize a model with 46894 rows, 12542 columns and 152152 nonzeros Presolve time: 0.16s Presolved: 46894 rows, 12542 columns, 152152 nonzeros Variable types: 0 continuous, 12542 integer (12542 binary) Root relaxation: objective 0.000000e+00, 539 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 (877 simplex iterations) in 0.27 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 -- 77 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:57:18 2012 Optimize a model with 23221 rows, 6497 columns and 75088 nonzeros Presolve time: 0.12s Presolved: 23221 rows, 6497 columns, 75088 nonzeros Variable types: 0 continuous, 6497 integer (6497 binary) Root relaxation: objective 0.000000e+00, 380 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 (655 simplex iterations) in 0.16 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 -- 38 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:57:19 2012 Optimize a model with 11688 rows, 3552 columns and 37544 nonzeros Presolve time: 0.04s Presolved: 11688 rows, 3552 columns, 37544 nonzeros Variable types: 0 continuous, 3552 integer (3552 binary) Root relaxation: objective 0.000000e+00, 330 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 (607 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 18:57:19 2012 Optimize a model with 5618 rows, 2002 columns and 17784 nonzeros Presolve time: 0.02s Presolved: 5618 rows, 2002 columns, 17784 nonzeros Variable types: 0 continuous, 2002 integer (2002 binary) Root relaxation: objective 0.000000e+00, 336 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 (566 simplex iterations) in 0.03 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 18:57:19 2012 Optimize a model with 2583 rows, 1227 columns and 7904 nonzeros Presolve time: 0.01s Presolved: 2583 rows, 1227 columns, 7904 nonzeros Variable types: 0 continuous, 1227 integer (1227 binary) Root relaxation: objective 0.000000e+00, 365 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 0.00000 0 288 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 359 - 0.00000 - - 0s 0 0 0.00000 0 284 - 0.00000 - - 0s 0 0 0.00000 0 278 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 0s 0 0 0.00000 0 266 - 0.00000 - - 1s 0 0 0.00000 0 258 - 0.00000 - - 1s 0 0 0.00000 0 256 - 0.00000 - - 1s 0 0 0.00000 0 244 - 0.00000 - - 1s 0 0 0.00000 0 236 - 0.00000 - - 1s 0 0 0.00000 0 234 - 0.00000 - - 1s 0 0 0.00000 0 228 - 0.00000 - - 1s 0 0 0.00000 0 240 - 0.00000 - - 1s 0 0 0.00000 0 238 - 0.00000 - - 1s 0 0 0.00000 0 236 - 0.00000 - - 2s 0 0 0.00000 0 222 - 0.00000 - - 2s 0 0 0.00000 0 222 - 0.00000 - - 2s 0 0 0.00000 0 222 - 0.00000 - - 2s 0 0 0.00000 0 222 - 0.00000 - - 2s 0 2 0.00000 0 222 - 0.00000 - - 2s * 140 1 23 0.0000000 0.00000 0.0% 56.4 3s Cutting planes: Zero half: 15 Explored 141 nodes (42425 simplex iterations) in 3.03 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 18:57:22 2012 Optimize a model with 1369 rows, 917 columns and 3952 nonzeros Presolve removed 155 rows and 155 columns Presolve time: 0.00s Presolved: 1214 rows, 762 columns, 3642 nonzeros Variable types: 0 continuous, 762 integer (762 binary) Root relaxation: objective 0.000000e+00, 168 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 0 155 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (650 simplex iterations) in 0.01 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 18:57:22 2012 Optimize a model with 1976 rows, 1072 columns and 5928 nonzeros Presolve time: 0.00s Presolved: 1976 rows, 1072 columns, 5928 nonzeros Variable types: 0 continuous, 1072 integer (1072 binary) Root relaxation: objective 0.000000e+00, 353 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 0 306 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3642 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