current bounds on the number of colors: 0 -- 140 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:40:06 2012 Optimize a model with 36120 rows, 10314 columns and 117740 nonzeros Presolve time: 0.14s Presolved: 36120 rows, 10314 columns, 117740 nonzeros Variable types: 0 continuous, 10314 integer (10314 binary) Root relaxation: objective 0.000000e+00, 482 iterations, 0.03 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 (482 simplex iterations) in 0.19 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 -- 70 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:40:06 2012 Optimize a model with 18130 rows, 5414 columns and 58870 nonzeros Presolve time: 0.09s Presolved: 18130 rows, 5414 columns, 58870 nonzeros Variable types: 0 continuous, 5414 integer (5414 binary) Root relaxation: objective 0.000000e+00, 360 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 (616 simplex iterations) in 0.13 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 -- 35 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:40:07 2012 Optimize a model with 8878 rows, 2894 columns and 28594 nonzeros Presolve time: 0.03s Presolved: 8878 rows, 2894 columns, 28594 nonzeros Variable types: 0 continuous, 2894 integer (2894 binary) Root relaxation: objective 0.000000e+00, 285 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 (526 simplex iterations) in 0.05 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 -- 17 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:40:07 2012 Optimize a model with 4252 rows, 1634 columns and 13456 nonzeros Presolve time: 0.01s Presolved: 4252 rows, 1634 columns, 13456 nonzeros Variable types: 0 continuous, 1634 integer (1634 binary) Root relaxation: objective 0.000000e+00, 315 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 (590 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:40:07 2012 Optimize a model with 2196 rows, 1074 columns and 6728 nonzeros Presolve time: 0.01s Presolved: 2196 rows, 1074 columns, 6728 nonzeros Variable types: 0 continuous, 1074 integer (1074 binary) Root relaxation: objective 0.000000e+00, 340 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 0 268 - 0.00000 - - 0s 0 0 0.00000 0 258 - 0.00000 - - 0s 0 0 0.00000 0 230 - 0.00000 - - 0s 0 0 0.00000 0 228 - 0.00000 - - 0s 0 0 0.00000 0 286 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 2 Zero half: 154 Explored 0 nodes (6398 simplex iterations) in 0.41 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 18:40:07 2012 Optimize a model with 1168 rows, 794 columns and 3364 nonzeros Presolve removed 140 rows and 140 columns Presolve time: 0.00s Presolved: 1028 rows, 654 columns, 3084 nonzeros Variable types: 0 continuous, 654 integer (654 binary) Root relaxation: objective 0.000000e+00, 150 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 0 140 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (582 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 18:40:07 2012 Optimize a model with 1682 rows, 934 columns and 5046 nonzeros Presolve time: 0.00s Presolved: 1682 rows, 934 columns, 5046 nonzeros Variable types: 0 continuous, 934 integer (934 binary) Root relaxation: objective 0.000000e+00, 348 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 0 272 - 0.00000 - - 0s 0 0 0.00000 0 266 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3125 simplex iterations) in 0.18 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