current bounds on the number of colors: 0 -- 126 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:33:04 2012 Optimize a model with 25074 rows, 8334 columns and 82782 nonzeros Presolve time: 0.13s Presolved: 25074 rows, 8334 columns, 82782 nonzeros Variable types: 0 continuous, 8334 integer (8334 binary) Root relaxation: objective 0.000000e+00, 392 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 (624 simplex iterations) in 0.18 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 -- 63 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:33:04 2012 Optimize a model with 12402 rows, 4302 columns and 40734 nonzeros Presolve time: 0.06s Presolved: 12402 rows, 4302 columns, 40734 nonzeros Variable types: 0 continuous, 4302 integer (4302 binary) Root relaxation: objective 0.000000e+00, 304 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 (529 simplex iterations) in 0.08 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 -- 31 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:33:05 2012 Optimize a model with 6066 rows, 2286 columns and 19710 nonzeros Presolve time: 0.02s Presolved: 6066 rows, 2286 columns, 19710 nonzeros Variable types: 0 continuous, 2286 integer (2286 binary) Root relaxation: objective 0.000000e+00, 255 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 (572 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% current bounds on the number of colors: 0 -- 15 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:33:05 2012 Optimize a model with 2898 rows, 1278 columns and 9198 nonzeros Presolve time: 0.01s Presolved: 2898 rows, 1278 columns, 9198 nonzeros Variable types: 0 continuous, 1278 integer (1278 binary) Root relaxation: objective 0.000000e+00, 288 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 (517 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 -- 7 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:33:05 2012 Optimize a model with 1314 rows, 774 columns and 3942 nonzeros Presolve time: 0.00s Presolved: 1314 rows, 774 columns, 3942 nonzeros Variable types: 0 continuous, 774 integer (774 binary) Root relaxation: objective 0.000000e+00, 329 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 0 238 - 0.00000 - - 0s 0 0 0.00000 0 244 - 0.00000 - - 0s 0 0 0.00000 0 222 - 0.00000 - - 0s 0 0 0.00000 0 238 - 0.00000 - - 0s 0 0 0.00000 0 285 - 0.00000 - - 0s 0 0 0.00000 0 311 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 0s 0 0 0.00000 0 286 - 0.00000 - - 0s 0 2 0.00000 0 284 - 0.00000 - - 0s Cutting planes: Zero half: 21 Explored 9 nodes (12081 simplex iterations) in 0.95 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 -- 7 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:33:06 2012 Optimize a model with 2106 rows, 1026 columns and 6570 nonzeros Presolve time: 0.01s Presolved: 2106 rows, 1026 columns, 6570 nonzeros Variable types: 0 continuous, 1026 integer (1026 binary) Root relaxation: objective 0.000000e+00, 281 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 (918 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:33:06 2012 Optimize a model with 1710 rows, 900 columns and 5256 nonzeros Presolve time: 0.00s Presolved: 1710 rows, 900 columns, 5256 nonzeros Variable types: 0 continuous, 900 integer (900 binary) Root relaxation: objective 0.000000e+00, 282 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 0 138 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1838 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% optimal solution found: number of colors: 4