current bounds on the number of colors: 0 -- 48 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:09:50 2012 Optimize a model with 14424 rows, 1751 columns and 44280 nonzeros Presolve time: 0.06s Presolved: 14424 rows, 1751 columns, 44280 nonzeros Variable types: 0 continuous, 1751 integer (1751 binary) Root relaxation: objective 0.000000e+00, 122 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 (286 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 -- 24 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:09:50 2012 Optimize a model with 7236 rows, 1175 columns and 22140 nonzeros Presolve time: 0.02s Presolved: 7236 rows, 1175 columns, 22140 nonzeros Variable types: 0 continuous, 1175 integer (1175 binary) Root relaxation: objective 0.000000e+00, 109 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 0.06 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:09:50 2012 Optimize a model with 3642 rows, 887 columns and 11070 nonzeros Presolve time: 0.01s Presolved: 3642 rows, 887 columns, 11070 nonzeros Variable types: 0 continuous, 887 integer (887 binary) Root relaxation: objective 0.000000e+00, 96 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 94 - 0.00000 - - 0s 0 0 0.00000 0 56 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1989 simplex iterations) in 0.30 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: 6 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:09:51 2012 Optimize a model with 5439 rows, 1031 columns and 16605 nonzeros Presolve time: 0.01s Presolved: 5439 rows, 1031 columns, 16605 nonzeros Variable types: 0 continuous, 1031 integer (1031 binary) Root relaxation: objective 0.000000e+00, 101 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 38 - 0.00000 - - 0s 0 0 0.00000 0 36 - 0.00000 - - 0s 0 0 0.00000 0 107 - 0.00000 - - 0s 0 0 0.00000 0 165 - 0.00000 - - 0s 0 0 0.00000 0 75 - 0.00000 - - 1s 0 0 0.00000 0 150 - 0.00000 - - 1s 0 0 0.00000 0 49 - 0.00000 - - 2s 0 0 0.00000 0 81 - 0.00000 - - 2s 0 0 0.00000 0 98 - 0.00000 - - 2s 0 0 0.00000 0 97 - 0.00000 - - 3s 0 2 0.00000 0 97 - 0.00000 - - 4s 20 8 0.00000 11 118 - 0.00000 - 177 5s Cutting planes: Clique: 63 Zero half: 8 Explored 186 nodes (44819 simplex iterations) in 6.51 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: 9 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:09:58 2012 Optimize a model with 6038 rows, 1079 columns and 18450 nonzeros Presolve time: 0.02s Presolved: 6038 rows, 1079 columns, 18450 nonzeros Variable types: 0 continuous, 1079 integer (1079 binary) Root relaxation: objective 0.000000e+00, 105 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 34 - 0.00000 - - 0s 0 0 0.00000 0 39 - 0.00000 - - 0s Cutting planes: Clique: 4 Explored 0 nodes (1579 simplex iterations) in 0.14 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: 10