current bounds on the number of colors: 0 -- 143 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:26 2012 Optimize a model with 39122 rows, 10702 columns and 127090 nonzeros Presolve time: 0.15s Presolved: 39122 rows, 10702 columns, 127090 nonzeros Variable types: 0 continuous, 10702 integer (10702 binary) Root relaxation: objective 0.000000e+00, 516 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 (827 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 18:41:26 2012 Optimize a model with 19358 rows, 5554 columns and 62650 nonzeros Presolve time: 0.10s Presolved: 19358 rows, 5554 columns, 62650 nonzeros Variable types: 0 continuous, 5554 integer (5554 binary) Root relaxation: objective 0.000000e+00, 363 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 (618 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 18:41:27 2012 Optimize a model with 9476 rows, 2980 columns and 30430 nonzeros Presolve time: 0.03s Presolved: 9476 rows, 2980 columns, 30430 nonzeros Variable types: 0 continuous, 2980 integer (2980 binary) Root relaxation: objective 0.000000e+00, 294 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 (539 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 18:41:27 2012 Optimize a model with 4535 rows, 1693 columns and 14320 nonzeros Presolve time: 0.01s Presolved: 4535 rows, 1693 columns, 14320 nonzeros Variable types: 0 continuous, 1693 integer (1693 binary) Root relaxation: objective 0.000000e+00, 309 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 (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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:27 2012 Optimize a model with 2339 rows, 1121 columns and 7160 nonzeros Presolve time: 0.01s Presolved: 2339 rows, 1121 columns, 7160 nonzeros Variable types: 0 continuous, 1121 integer (1121 binary) Root relaxation: objective 0.000000e+00, 318 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 0 266 - 0.00000 - - 0s 0 0 0.00000 0 252 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (4711 simplex iterations) in 0.30 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 18:41:27 2012 Optimize a model with 1241 rows, 835 columns and 3580 nonzeros Presolve removed 143 rows and 143 columns Presolve time: 0.00s Presolved: 1098 rows, 692 columns, 3294 nonzeros Variable types: 0 continuous, 692 integer (692 binary) Root relaxation: objective 0.000000e+00, 154 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 0 143 - 0.00000 - - 0s Explored 0 nodes (629 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 18:41:27 2012 Optimize a model with 1790 rows, 978 columns and 5370 nonzeros Presolve time: 0.00s Presolved: 1790 rows, 978 columns, 5370 nonzeros Variable types: 0 continuous, 978 integer (978 binary) Root relaxation: objective 0.000000e+00, 359 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 0 204 - 0.00000 - - 0s 0 0 0.00000 0 299 - 0.00000 - - 0s 0 0 0.00000 0 385 - 0.00000 - - 0s 0 0 0.00000 0 386 - 0.00000 - - 0s 0 0 0.00000 0 284 - 0.00000 - - 1s 0 0 0.00000 0 384 - 0.00000 - - 1s 0 0 0.00000 0 366 - 0.00000 - - 1s 0 0 0.00000 0 377 - 0.00000 - - 1s 0 0 0.00000 0 382 - 0.00000 - - 2s 0 0 0.00000 0 382 - 0.00000 - - 2s 0 2 0.00000 0 382 - 0.00000 - - 2s Cutting planes: Clique: 2 Zero half: 23 Explored 3 nodes (20234 simplex iterations) in 2.48 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