current bounds on the number of colors: 0 -- 129 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:11 2012 Optimize a model with 25345 rows, 8650 columns and 83904 nonzeros Presolve time: 0.13s Presolved: 25345 rows, 8650 columns, 83904 nonzeros Variable types: 0 continuous, 8650 integer (8650 binary) Root relaxation: objective 0.000000e+00, 403 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 (647 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 -- 64 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:11 2012 Optimize a model with 12737 rows, 4522 columns and 41952 nonzeros Presolve time: 0.06s Presolved: 12737 rows, 4522 columns, 41952 nonzeros Variable types: 0 continuous, 4522 integer (4522 binary) Root relaxation: objective 0.000000e+00, 359 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 (608 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 -- 32 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:11 2012 Optimize a model with 6433 rows, 2458 columns and 20976 nonzeros Presolve time: 0.02s Presolved: 6433 rows, 2458 columns, 20976 nonzeros Variable types: 0 continuous, 2458 integer (2458 binary) Root relaxation: objective 0.000000e+00, 271 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 (473 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 -- 16 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:12 2012 Optimize a model with 3281 rows, 1426 columns and 10488 nonzeros Presolve time: 0.01s Presolved: 3281 rows, 1426 columns, 10488 nonzeros Variable types: 0 continuous, 1426 integer (1426 binary) Root relaxation: objective 0.000000e+00, 275 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 (486 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 18:34:12 2012 Optimize a model with 1705 rows, 910 columns and 5244 nonzeros Presolve time: 0.00s Presolved: 1705 rows, 910 columns, 5244 nonzeros Variable types: 0 continuous, 910 integer (910 binary) Root relaxation: objective 0.000000e+00, 287 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 (1813 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:12 2012 Optimize a model with 917 rows, 652 columns and 2622 nonzeros Presolve removed 129 rows and 129 columns Presolve time: 0.00s Presolved: 788 rows, 523 columns, 2364 nonzeros Variable types: 0 continuous, 523 integer (523 binary) Root relaxation: objective 0.000000e+00, 136 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 0 129 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (491 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 18:34:12 2012 Optimize a model with 1311 rows, 781 columns and 3933 nonzeros Presolve time: 0.00s Presolved: 1311 rows, 781 columns, 3933 nonzeros Variable types: 0 continuous, 781 integer (781 binary) Root relaxation: objective 0.000000e+00, 309 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 0 240 - 0.00000 - - 0s 0 0 0.00000 0 236 - 0.00000 - - 0s 0 0 0.00000 0 251 - 0.00000 - - 0s 0 0 0.00000 0 317 - 0.00000 - - 0s 0 0 0.00000 0 290 - 0.00000 - - 0s 0 0 0.00000 0 293 - 0.00000 - - 0s 0 0 0.00000 0 314 - 0.00000 - - 0s 0 0 0.00000 0 291 - 0.00000 - - 0s 0 0 0.00000 0 314 - 0.00000 - - 0s 0 0 0.00000 0 314 - 0.00000 - - 0s 0 2 0.00000 0 314 - 0.00000 - - 1s Cutting planes: Gomory: 1 Zero half: 15 Explored 15 nodes (13362 simplex iterations) in 1.10 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