current bounds on the number of colors: 0 -- 47 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:07:20 2012 Optimize a model with 12352 rows, 1616 columns and 37996 nonzeros Presolve time: 0.05s Presolved: 12352 rows, 1616 columns, 37996 nonzeros Variable types: 0 continuous, 1616 integer (1616 binary) Root relaxation: objective 0.000000e+00, 118 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 (296 simplex iterations) in 0.08 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 -- 23 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:07:21 2012 Optimize a model with 5932 rows, 1052 columns and 18172 nonzeros Presolve time: 0.02s Presolved: 5932 rows, 1052 columns, 18172 nonzeros Variable types: 0 continuous, 1052 integer (1052 binary) Root relaxation: objective 0.000000e+00, 102 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 44 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (762 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 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:07:21 2012 Optimize a model with 2722 rows, 770 columns and 8260 nonzeros Presolve time: 0.01s Presolved: 2722 rows, 770 columns, 8260 nonzeros Variable types: 0 continuous, 770 integer (770 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 60 - 0.00000 - - 0s 0 0 0.00000 0 62 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1755 simplex iterations) in 0.19 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: 5 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:07:21 2012 Optimize a model with 4327 rows, 911 columns and 13216 nonzeros Presolve time: 0.01s Presolved: 4327 rows, 911 columns, 13216 nonzeros Variable types: 0 continuous, 911 integer (911 binary) Root relaxation: objective 0.000000e+00, 95 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 66 - 0.00000 - - 0s 0 0 0.00000 0 47 - 0.00000 - - 0s 0 0 0.00000 0 160 - 0.00000 - - 0s 0 0 0.00000 0 204 - 0.00000 - - 0s 0 0 0.00000 0 179 - 0.00000 - - 1s 0 0 0.00000 0 165 - 0.00000 - - 1s 0 0 0.00000 0 162 - 0.00000 - - 2s 0 0 0.00000 0 150 - 0.00000 - - 2s 0 0 0.00000 0 162 - 0.00000 - - 2s 0 0 0.00000 0 212 - 0.00000 - - 3s 0 0 0.00000 0 225 - 0.00000 - - 3s 0 0 0.00000 0 225 - 0.00000 - - 3s 0 2 0.00000 0 225 - 0.00000 - - 4s 48 4 0.00000 4 185 - 0.00000 - 179 5s Cutting planes: Clique: 139 Zero half: 12 Explored 65 nodes (39647 simplex iterations) in 5.34 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: 8 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:07:26 2012 Optimize a model with 4862 rows, 958 columns and 14868 nonzeros Presolve time: 0.01s Presolved: 4862 rows, 958 columns, 14868 nonzeros Variable types: 0 continuous, 958 integer (958 binary) Root relaxation: objective 0.000000e+00, 97 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 36 - 0.00000 - - 0s 0 0 0.00000 0 34 - 0.00000 - - 0s 0 0 0.00000 0 90 - 0.00000 - - 0s 0 0 0.00000 0 156 - 0.00000 - - 0s 0 0 0.00000 0 63 - 0.00000 - - 1s 0 0 0.00000 0 16 - 0.00000 - - 1s 0 0 0.00000 0 84 - 0.00000 - - 1s 0 0 0.00000 0 25 - 0.00000 - - 1s 0 0 0.00000 0 24 - 0.00000 - - 1s * 0 0 0 0.0000000 0.00000 0.0% - 2s Cutting planes: Clique: 7 Zero half: 5 Explored 0 nodes (19688 simplex iterations) in 2.06 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% optimal solution found: number of colors: 9