current bounds on the number of colors: 0 -- 34 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:46 2012 Optimize a model with 969 rows, 633 columns and 3383 nonzeros Presolve removed 1 rows and 17 columns Presolve time: 0.00s Presolved: 968 rows, 616 columns, 3366 nonzeros Variable types: 0 continuous, 616 integer (616 binary) Root relaxation: objective 0.000000e+00, 71 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 (71 simplex iterations) in 0.01 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 Thu Dec 13 19:35:46 2012 Optimize a model with 474 rows, 327 columns and 1592 nonzeros Presolve removed 1 rows and 8 columns Presolve time: 0.00s Presolved: 473 rows, 319 columns, 1584 nonzeros Variable types: 0 continuous, 319 integer (319 binary) Root relaxation: objective 0.000000e+00, 69 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 (69 simplex iterations) in 0.00 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 Thu Dec 13 19:35:46 2012 Optimize a model with 254 rows, 191 columns and 796 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 253 rows, 187 columns, 792 nonzeros Variable types: 0 continuous, 187 integer (187 binary) Root relaxation: objective 0.000000e+00, 73 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 (173 simplex iterations) in 0.00 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 Thu Dec 13 19:35:46 2012 Optimize a model with 144 rows, 123 columns and 398 nonzeros Presolve removed 34 rows and 35 columns Presolve time: 0.00s Presolved: 110 rows, 88 columns, 330 nonzeros Variable types: 0 continuous, 88 integer (88 binary) Root relaxation: objective 0.000000e+00, 33 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 33 - 0.00000 - - 0s Explored 0 nodes (107 simplex iterations) in 0.00 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 Thu Dec 13 19:35:46 2012 Optimize a model with 199 rows, 157 columns and 597 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 198 rows, 154 columns, 594 nonzeros Variable types: 0 continuous, 154 integer (154 binary) Root relaxation: objective 0.000000e+00, 71 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 (111 simplex iterations) in 0.00 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: 3