current bounds on the number of colors: 0 -- 70 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:52 2012 Optimize a model with 1050 rows, 2478 columns and 5390 nonzeros Presolve removed 27 rows and 945 columns Presolve time: 0.01s Presolved: 1023 rows, 1533 columns, 4445 nonzeros Variable types: 0 continuous, 1533 integer (1533 binary) Root relaxation: objective 0.000000e+00, 68 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 (68 simplex iterations) in 0.01 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 Sat Dec 15 16:13:52 2012 Optimize a model with 546 rows, 1218 columns and 2618 nonzeros Presolve removed 27 rows and 459 columns Presolve time: 0.00s Presolved: 519 rows, 759 columns, 2159 nonzeros Variable types: 0 continuous, 759 integer (759 binary) Root relaxation: objective 0.000000e+00, 68 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 (68 simplex iterations) in 0.00 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 Sat Dec 15 16:13:52 2012 Optimize a model with 294 rows, 588 columns and 1232 nonzeros Presolve removed 27 rows and 216 columns Presolve time: 0.00s Presolved: 267 rows, 372 columns, 1016 nonzeros Variable types: 0 continuous, 372 integer (372 binary) Root relaxation: objective 0.000000e+00, 69 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 (69 simplex iterations) in 0.00 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 Sat Dec 15 16:13:52 2012 Optimize a model with 182 rows, 308 columns and 616 nonzeros Presolve removed 27 rows and 108 columns Presolve time: 0.00s Presolved: 155 rows, 200 columns, 508 nonzeros Variable types: 0 continuous, 200 integer (200 binary) Root relaxation: objective 0.000000e+00, 61 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 (61 simplex iterations) in 0.00 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 Sat Dec 15 16:13:52 2012 Optimize a model with 126 rows, 168 columns and 308 nonzeros Presolve removed 88 rows and 124 columns Presolve time: 0.00s Presolved: 38 rows, 44 columns, 114 nonzeros Variable types: 0 continuous, 44 integer (44 binary) Root relaxation: objective 0.000000e+00, 14 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 (14 simplex iterations) in 0.00 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 -- 2 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:52 2012 Optimize a model with 98 rows, 98 columns and 154 nonzeros Presolve removed 98 rows and 98 columns Presolve time: 0.00s Explored 0 nodes (0 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 2