current bounds on the number of colors: 0 -- 151 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:48:58 2012 Optimize a model with 41551 rows, 11877 columns and 135525 nonzeros Presolve time: 0.15s Presolved: 41551 rows, 11877 columns, 135525 nonzeros Variable types: 0 continuous, 11877 integer (11877 binary) Root relaxation: objective 0.000000e+00, 485 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 (754 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 -- 75 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:48:58 2012 Optimize a model with 20575 rows, 6139 columns and 66859 nonzeros Presolve time: 0.11s Presolved: 20575 rows, 6139 columns, 66859 nonzeros Variable types: 0 continuous, 6139 integer (6139 binary) Root relaxation: objective 0.000000e+00, 468 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 (790 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 -- 37 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:48:59 2012 Optimize a model with 10087 rows, 3270 columns and 32526 nonzeros Presolve time: 0.04s Presolved: 10087 rows, 3270 columns, 32526 nonzeros Variable types: 0 continuous, 3270 integer (3270 binary) Root relaxation: objective 0.000000e+00, 314 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 (569 simplex iterations) in 0.06 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 -- 18 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:48:59 2012 Optimize a model with 5119 rows, 1911 columns and 16263 nonzeros Presolve time: 0.02s Presolved: 5119 rows, 1911 columns, 16263 nonzeros Variable types: 0 continuous, 1911 integer (1911 binary) Root relaxation: objective 0.000000e+00, 324 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 (582 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 18:48:59 2012 Optimize a model with 2359 rows, 1156 columns and 7228 nonzeros Presolve time: 0.01s Presolved: 2359 rows, 1156 columns, 7228 nonzeros Variable types: 0 continuous, 1156 integer (1156 binary) Root relaxation: objective 0.000000e+00, 352 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 0 264 - 0.00000 - - 0s 0 0 0.00000 0 262 - 0.00000 - - 0s 0 0 0.00000 0 254 - 0.00000 - - 0s 0 0 0.00000 0 248 - 0.00000 - - 0s 0 0 0.00000 0 354 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Zero half: 243 Explored 0 nodes (7988 simplex iterations) in 0.56 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 18:49:00 2012 Optimize a model with 1255 rows, 854 columns and 3614 nonzeros Presolve removed 151 rows and 151 columns Presolve time: 0.00s Presolved: 1104 rows, 703 columns, 3312 nonzeros Variable types: 0 continuous, 703 integer (703 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 0 151 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (664 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 18:49:00 2012 Optimize a model with 1807 rows, 1005 columns and 5421 nonzeros Presolve time: 0.00s Presolved: 1807 rows, 1005 columns, 5421 nonzeros Variable types: 0 continuous, 1005 integer (1005 binary) Root relaxation: objective 0.000000e+00, 372 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 0 292 - 0.00000 - - 0s 0 0 0.00000 0 286 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 399 - 0.00000 - - 0s 0 0 0.00000 0 290 - 0.00000 - - 0s 0 0 0.00000 0 286 - 0.00000 - - 0s 0 0 0.00000 0 286 - 0.00000 - - 0s 0 0 0.00000 0 286 - 0.00000 - - 1s 0 0 0.00000 0 299 - 0.00000 - - 1s 0 0 0.00000 0 297 - 0.00000 - - 1s 0 2 0.00000 0 297 - 0.00000 - - 1s Cutting planes: Gomory: 1 Zero half: 69 Explored 7 nodes (18035 simplex iterations) in 1.61 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