current bounds on the number of colors: 0 -- 155 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:56:30 2012 Optimize a model with 45508 rows, 12524 columns and 147994 nonzeros Presolve time: 0.16s Presolved: 45508 rows, 12524 columns, 147994 nonzeros Variable types: 0 continuous, 12524 integer (12524 binary) Root relaxation: objective 0.000000e+00, 550 iterations, 0.04 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 (841 simplex iterations) in 0.27 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 -- 77 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:56:31 2012 Optimize a model with 22537 rows, 6479 columns and 73036 nonzeros Presolve time: 0.12s Presolved: 22537 rows, 6479 columns, 73036 nonzeros Variable types: 0 continuous, 6479 integer (6479 binary) Root relaxation: objective 0.000000e+00, 400 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 (683 simplex iterations) in 0.16 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 -- 38 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:56:31 2012 Optimize a model with 11346 rows, 3534 columns and 36518 nonzeros Presolve time: 0.04s Presolved: 11346 rows, 3534 columns, 36518 nonzeros Variable types: 0 continuous, 3534 integer (3534 binary) Root relaxation: objective 0.000000e+00, 313 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 (584 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:56:31 2012 Optimize a model with 5456 rows, 1984 columns and 17298 nonzeros Presolve time: 0.02s Presolved: 5456 rows, 1984 columns, 17298 nonzeros Variable types: 0 continuous, 1984 integer (1984 binary) Root relaxation: objective 0.000000e+00, 330 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 (619 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:56:31 2012 Optimize a model with 2511 rows, 1209 columns and 7688 nonzeros Presolve time: 0.01s Presolved: 2511 rows, 1209 columns, 7688 nonzeros Variable types: 0 continuous, 1209 integer (1209 binary) Root relaxation: objective 0.000000e+00, 392 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 0s 0 0 0.00000 0 242 - 0.00000 - - 0s 0 0 0.00000 0 307 - 0.00000 - - 0s 0 0 0.00000 0 313 - 0.00000 - - 0s 0 0 0.00000 0 54 - 0.00000 - - 0s 0 0 0.00000 0 111 - 0.00000 - - 1s 0 0 0.00000 0 317 - 0.00000 - - 1s 0 0 0.00000 0 283 - 0.00000 - - 1s 0 2 0.00000 0 279 - 0.00000 - - 2s * 65 3 25 0.0000000 0.00000 0.0% 84.4 2s Cutting planes: Clique: 1 Zero half: 7 Explored 66 nodes (23657 simplex iterations) in 2.45 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 18:56:34 2012 Optimize a model with 1333 rows, 899 columns and 3844 nonzeros Presolve removed 155 rows and 155 columns Presolve time: 0.00s Presolved: 1178 rows, 744 columns, 3534 nonzeros Variable types: 0 continuous, 744 integer (744 binary) Root relaxation: objective 0.000000e+00, 160 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 0 155 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (661 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 18:56:34 2012 Optimize a model with 1922 rows, 1054 columns and 5766 nonzeros Presolve time: 0.00s Presolved: 1922 rows, 1054 columns, 5766 nonzeros Variable types: 0 continuous, 1054 integer (1054 binary) Root relaxation: objective 0.000000e+00, 355 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 0 306 - 0.00000 - - 0s 0 0 0.00000 0 311 - 0.00000 - - 0s 0 0 0.00000 0 344 - 0.00000 - - 0s 0 0 0.00000 0 402 - 0.00000 - - 0s 0 0 0.00000 0 315 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 0.00000 0 313 - 0.00000 - - 1s 0 0 0.00000 0 300 - 0.00000 - - 1s 0 0 0.00000 0 317 - 0.00000 - - 1s 0 0 0.00000 0 307 - 0.00000 - - 1s 0 0 0.00000 0 309 - 0.00000 - - 1s 0 0 0.00000 0 290 - 0.00000 - - 2s 0 2 0.00000 0 290 - 0.00000 - - 2s Cutting planes: Zero half: 21 Explored 3 nodes (22845 simplex iterations) in 2.29 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