current bounds on the number of colors: 0 -- 142 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:40:47 2012 Optimize a model with 38269 rows, 10619 columns and 124463 nonzeros Presolve time: 0.15s Presolved: 38269 rows, 10619 columns, 124463 nonzeros Variable types: 0 continuous, 10619 integer (10619 binary) Root relaxation: objective 0.000000e+00, 521 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 (841 simplex iterations) in 0.24 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 -- 71 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:40:47 2012 Optimize a model with 18937 rows, 5507 columns and 61355 nonzeros Presolve time: 0.09s Presolved: 18937 rows, 5507 columns, 61355 nonzeros Variable types: 0 continuous, 5507 integer (5507 binary) Root relaxation: objective 0.000000e+00, 414 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 (693 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 18:40:48 2012 Optimize a model with 9271 rows, 2951 columns and 29801 nonzeros Presolve time: 0.03s Presolved: 9271 rows, 2951 columns, 29801 nonzeros Variable types: 0 continuous, 2951 integer (2951 binary) Root relaxation: objective 0.000000e+00, 290 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 (552 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 18:40:48 2012 Optimize a model with 4438 rows, 1673 columns and 14024 nonzeros Presolve time: 0.01s Presolved: 4438 rows, 1673 columns, 14024 nonzeros Variable types: 0 continuous, 1673 integer (1673 binary) Root relaxation: objective 0.000000e+00, 311 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 (557 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 18:40:48 2012 Optimize a model with 2290 rows, 1105 columns and 7012 nonzeros Presolve time: 0.01s Presolved: 2290 rows, 1105 columns, 7012 nonzeros Variable types: 0 continuous, 1105 integer (1105 binary) Root relaxation: objective 0.000000e+00, 323 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 0 264 - 0.00000 - - 0s 0 0 0.00000 0 250 - 0.00000 - - 0s 0 0 0.00000 0 248 - 0.00000 - - 0s 0 0 0.00000 0 273 - 0.00000 - - 0s 0 0 0.00000 0 244 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Zero half: 25 Explored 0 nodes (9996 simplex iterations) in 0.71 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 18:40:49 2012 Optimize a model with 1216 rows, 821 columns and 3506 nonzeros Presolve removed 142 rows and 142 columns Presolve time: 0.00s Presolved: 1074 rows, 679 columns, 3222 nonzeros Variable types: 0 continuous, 679 integer (679 binary) Root relaxation: objective 0.000000e+00, 151 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 0 142 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (599 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 18:40:49 2012 Optimize a model with 1753 rows, 963 columns and 5259 nonzeros Presolve time: 0.00s Presolved: 1753 rows, 963 columns, 5259 nonzeros Variable types: 0 continuous, 963 integer (963 binary) Root relaxation: objective 0.000000e+00, 338 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 0 282 - 0.00000 - - 0s 0 0 0.00000 0 318 - 0.00000 - - 0s 0 0 0.00000 0 348 - 0.00000 - - 0s 0 0 0.00000 0 354 - 0.00000 - - 0s 0 0 0.00000 0 334 - 0.00000 - - 0s 0 0 0.00000 0 339 - 0.00000 - - 1s 0 0 0.00000 0 372 - 0.00000 - - 1s 0 0 0.00000 0 340 - 0.00000 - - 1s 0 2 0.00000 0 330 - 0.00000 - - 1s Cutting planes: Gomory: 1 Zero half: 58 Explored 3 nodes (15148 simplex iterations) in 1.60 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4