current bounds on the number of colors: 0 -- 136 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:32 2012 Optimize a model with 29444 rows, 9679 columns and 97172 nonzeros Presolve time: 0.14s Presolved: 29444 rows, 9679 columns, 97172 nonzeros Variable types: 0 continuous, 9679 integer (9679 binary) Root relaxation: objective 0.000000e+00, 431 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 (702 simplex iterations) in 0.21 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 -- 68 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:32 2012 Optimize a model with 14790 rows, 5055 columns and 48586 nonzeros Presolve time: 0.07s Presolved: 14790 rows, 5055 columns, 48586 nonzeros Variable types: 0 continuous, 5055 integer (5055 binary) Root relaxation: objective 0.000000e+00, 397 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 (685 simplex iterations) in 0.11 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 -- 34 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:33 2012 Optimize a model with 7463 rows, 2743 columns and 24293 nonzeros Presolve time: 0.03s Presolved: 7463 rows, 2743 columns, 24293 nonzeros Variable types: 0 continuous, 2743 integer (2743 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 (516 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 -- 17 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:33 2012 Optimize a model with 3584 rows, 1519 columns and 11432 nonzeros Presolve time: 0.01s Presolved: 3584 rows, 1519 columns, 11432 nonzeros Variable types: 0 continuous, 1519 integer (1519 binary) Root relaxation: objective 0.000000e+00, 307 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 (536 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:33 2012 Optimize a model with 1860 rows, 975 columns and 5716 nonzeros Presolve time: 0.00s Presolved: 1860 rows, 975 columns, 5716 nonzeros Variable types: 0 continuous, 975 integer (975 binary) Root relaxation: objective 0.000000e+00, 339 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 68 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2102 simplex iterations) in 0.09 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 18:37:33 2012 Optimize a model with 998 rows, 703 columns and 2858 nonzeros Presolve removed 136 rows and 136 columns Presolve time: 0.00s Presolved: 862 rows, 567 columns, 2586 nonzeros Variable types: 0 continuous, 567 integer (567 binary) Root relaxation: objective 0.000000e+00, 150 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 0 136 - 0.00000 - - 0s Explored 0 nodes (557 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 18:37:33 2012 Optimize a model with 1429 rows, 839 columns and 4287 nonzeros Presolve time: 0.00s Presolved: 1429 rows, 839 columns, 4287 nonzeros Variable types: 0 continuous, 839 integer (839 binary) Root relaxation: objective 0.000000e+00, 330 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 0 258 - 0.00000 - - 0s 0 0 0.00000 0 266 - 0.00000 - - 0s 0 0 0.00000 0 254 - 0.00000 - - 0s 0 0 0.00000 0 254 - 0.00000 - - 0s 0 0 0.00000 0 313 - 0.00000 - - 0s 0 0 0.00000 0 317 - 0.00000 - - 0s 0 0 0.00000 0 323 - 0.00000 - - 0s 0 0 0.00000 0 323 - 0.00000 - - 0s 0 2 0.00000 0 313 - 0.00000 - - 1s Cutting planes: Zero half: 41 Explored 7 nodes (12026 simplex iterations) in 1.04 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