current bounds on the number of colors: 0 -- 111 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:27:11 2012 Optimize a model with 18866 rows, 6446 columns and 62370 nonzeros Presolve removed 1 rows and 55 columns Presolve time: 0.12s Presolved: 18865 rows, 6391 columns, 62315 nonzeros Variable types: 0 continuous, 6391 integer (6391 binary) Root relaxation: objective 0.000000e+00, 345 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 (345 simplex iterations) in 0.15 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 -- 55 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:27:12 2012 Optimize a model with 9318 rows, 3338 columns and 30618 nonzeros Presolve removed 1 rows and 27 columns Presolve time: 0.04s Presolved: 9317 rows, 3311 columns, 30591 nonzeros Variable types: 0 continuous, 3311 integer (3311 binary) Root relaxation: objective 0.000000e+00, 272 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 (482 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 -- 27 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:27:12 2012 Optimize a model with 4544 rows, 1784 columns and 14742 nonzeros Presolve removed 1 rows and 13 columns Presolve time: 0.02s Presolved: 4543 rows, 1771 columns, 14729 nonzeros Variable types: 0 continuous, 1771 integer (1771 binary) Root relaxation: objective 0.000000e+00, 261 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 (459 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 -- 13 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:27:12 2012 Optimize a model with 2157 rows, 1007 columns and 6804 nonzeros Presolve removed 1 rows and 6 columns Presolve time: 0.01s Presolved: 2156 rows, 1001 columns, 6798 nonzeros Variable types: 0 continuous, 1001 integer (1001 binary) Root relaxation: objective 0.000000e+00, 245 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 (597 simplex iterations) in 0.02 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 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:27:12 2012 Optimize a model with 1134 rows, 674 columns and 3402 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 1133 rows, 671 columns, 3399 nonzeros Variable types: 0 continuous, 671 integer (671 binary) Root relaxation: objective 0.000000e+00, 256 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 0 214 - 0.00000 - - 0s 0 0 0.00000 0 190 - 0.00000 - - 0s 0 0 0.00000 0 202 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 0s 0 0 0.00000 0 243 - 0.00000 - - 0s 0 0 0.00000 0 246 - 0.00000 - - 0s 0 0 0.00000 0 281 - 0.00000 - - 0s 0 0 0.00000 0 281 - 0.00000 - - 0s 0 2 0.00000 0 222 - 0.00000 - - 0s Cutting planes: Zero half: 21 Explored 3 nodes (8824 simplex iterations) in 0.65 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: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:27:13 2012 Optimize a model with 1475 rows, 785 columns and 4536 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1474 rows, 781 columns, 4532 nonzeros Variable types: 0 continuous, 781 integer (781 binary) Root relaxation: objective 0.000000e+00, 273 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 96 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1269 simplex iterations) in 0.04 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: 4