current bounds on the number of colors: 0 -- 43 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:02:00 2012 Optimize a model with 9724 rows, 1364 columns and 29946 nonzeros Presolve time: 0.04s Presolved: 9724 rows, 1364 columns, 29946 nonzeros Variable types: 0 continuous, 1364 integer (1364 binary) Root relaxation: objective 0.000000e+00, 97 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 (321 simplex iterations) in 0.07 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 -- 21 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:02:00 2012 Optimize a model with 4653 rows, 891 columns and 14260 nonzeros Presolve time: 0.01s Presolved: 4653 rows, 891 columns, 14260 nonzeros Variable types: 0 continuous, 891 integer (891 binary) Root relaxation: objective 0.000000e+00, 99 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 34 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (683 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 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:02:00 2012 Optimize a model with 2348 rows, 676 columns and 7130 nonzeros Presolve time: 0.01s Presolved: 2348 rows, 676 columns, 7130 nonzeros Variable types: 0 continuous, 676 integer (676 binary) Root relaxation: objective 0.000000e+00, 86 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 52 - 0.00000 - - 0s 0 0 0.00000 0 52 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1666 simplex iterations) in 0.19 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: 5 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:02:01 2012 Optimize a model with 3270 rows, 762 columns and 9982 nonzeros Presolve time: 0.01s Presolved: 3270 rows, 762 columns, 9982 nonzeros Variable types: 0 continuous, 762 integer (762 binary) Root relaxation: objective 0.000000e+00, 87 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 38 - 0.00000 - - 0s 0 0 0.00000 0 54 - 0.00000 - - 0s 0 0 0.00000 0 206 - 0.00000 - - 0s 0 0 0.00000 0 247 - 0.00000 - - 0s 0 0 0.00000 0 220 - 0.00000 - - 1s 0 0 0.00000 0 218 - 0.00000 - - 1s 0 0 0.00000 0 225 - 0.00000 - - 2s 0 0 0.00000 0 236 - 0.00000 - - 2s 0 0 0.00000 0 211 - 0.00000 - - 3s 0 0 0.00000 0 221 - 0.00000 - - 4s 0 0 0.00000 0 215 - 0.00000 - - 4s 0 2 0.00000 0 215 - 0.00000 - - 4s Cutting planes: Clique: 54 Zero half: 25 Explored 3 nodes (29797 simplex iterations) in 4.73 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 7 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:02:05 2012 Optimize a model with 3731 rows, 805 columns and 11408 nonzeros Presolve time: 0.01s Presolved: 3731 rows, 805 columns, 11408 nonzeros Variable types: 0 continuous, 805 integer (805 binary) Root relaxation: objective 0.000000e+00, 88 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 30 - 0.00000 - - 0s 0 0 0.00000 0 22 - 0.00000 - - 0s 0 0 0.00000 0 136 - 0.00000 - - 0s 0 0 0.00000 0 177 - 0.00000 - - 0s 0 0 0.00000 0 157 - 0.00000 - - 0s 0 0 0.00000 0 165 - 0.00000 - - 1s 0 0 0.00000 0 187 - 0.00000 - - 1s 0 0 0.00000 0 187 - 0.00000 - - 1s 0 0 0.00000 0 184 - 0.00000 - - 1s 0 2 0.00000 0 181 - 0.00000 - - 2s Cutting planes: Clique: 82 Zero half: 4 Explored 35 nodes (19659 simplex iterations) in 2.47 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 8 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:02:08 2012 Optimize a model with 4192 rows, 848 columns and 12834 nonzeros Presolve time: 0.01s Presolved: 4192 rows, 848 columns, 12834 nonzeros Variable types: 0 continuous, 848 integer (848 binary) Root relaxation: objective 0.000000e+00, 89 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 40 - 0.00000 - - 0s 0 0 0.00000 0 48 - 0.00000 - - 0s Cutting planes: Clique: 2 Explored 0 nodes (1432 simplex iterations) in 0.10 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% optimal solution found: number of colors: 9