current bounds on the number of colors: 0 -- 58 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:15:16 2012 Optimize a model with 23635 rows, 2495 columns and 72413 nonzeros Presolve time: 0.10s Presolved: 23635 rows, 2495 columns, 72413 nonzeros Variable types: 0 continuous, 2495 integer (2495 binary) Root relaxation: objective 0.000000e+00, 139 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 (531 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 -- 29 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:15:17 2012 Optimize a model with 11440 rows, 1625 columns and 34958 nonzeros Presolve time: 0.04s Presolved: 11440 rows, 1625 columns, 34958 nonzeros Variable types: 0 continuous, 1625 integer (1625 binary) Root relaxation: objective 0.000000e+00, 130 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 16 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1397 simplex iterations) in 0.15 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 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:15:17 2012 Optimize a model with 5749 rows, 1219 columns and 17479 nonzeros Presolve time: 0.02s Presolved: 5749 rows, 1219 columns, 17479 nonzeros Variable types: 0 continuous, 1219 integer (1219 binary) Root relaxation: objective 0.000000e+00, 118 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 58 - 0.00000 - - 0s 0 0 0.00000 0 50 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3212 simplex iterations) in 0.49 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: 7 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:15:18 2012 Optimize a model with 8188 rows, 1393 columns and 24970 nonzeros Presolve time: 0.02s Presolved: 8188 rows, 1393 columns, 24970 nonzeros Variable types: 0 continuous, 1393 integer (1393 binary) Root relaxation: objective 0.000000e+00, 128 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 48 - 0.00000 - - 0s 0 0 0.00000 0 46 - 0.00000 - - 0s 0 0 0.00000 0 148 - 0.00000 - - 1s 0 0 0.00000 0 178 - 0.00000 - - 1s 0 0 0.00000 0 120 - 0.00000 - - 2s 0 0 0.00000 0 146 - 0.00000 - - 2s 0 0 0.00000 0 101 - 0.00000 - - 3s 0 0 0.00000 0 104 - 0.00000 - - 3s 0 0 0.00000 0 160 - 0.00000 - - 4s 0 0 0.00000 0 178 - 0.00000 - - 5s 0 0 0.00000 0 178 - 0.00000 - - 6s 0 2 0.00000 0 178 - 0.00000 - - 6s 468 106 infeasible 28 - 0.00000 - 76.1 10s H 495 0 0.0000000 0.00000 0.0% 75.8 10s Cutting planes: Clique: 64 Explored 495 nodes (74898 simplex iterations) in 10.14 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% current bounds on the number of colors: 7 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:15:28 2012 Optimize a model with 6562 rows, 1277 columns and 19976 nonzeros Presolve time: 0.02s Presolved: 6562 rows, 1277 columns, 19976 nonzeros Variable types: 0 continuous, 1277 integer (1277 binary) Root relaxation: objective 0.000000e+00, 127 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 56 - 0.00000 - - 0s 0 0 0.00000 0 48 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 1s 0 0 0.00000 0 330 - 0.00000 - - 1s 0 0 0.00000 0 303 - 0.00000 - - 2s 0 0 0.00000 0 318 - 0.00000 - - 3s 0 0 0.00000 0 313 - 0.00000 - - 6s 0 0 0.00000 0 327 - 0.00000 - - 7s 0 0 0.00000 0 297 - 0.00000 - - 9s 0 0 0.00000 0 313 - 0.00000 - - 12s 0 0 0.00000 0 279 - 0.00000 - - 12s 0 2 0.00000 0 279 - 0.00000 - - 13s Cutting planes: Clique: 113 Zero half: 2 Explored 11 nodes (48688 simplex iterations) in 14.16 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 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:15:42 2012 Optimize a model with 7375 rows, 1335 columns and 22473 nonzeros Presolve time: 0.02s Presolved: 7375 rows, 1335 columns, 22473 nonzeros Variable types: 0 continuous, 1335 integer (1335 binary) Root relaxation: objective 0.000000e+00, 131 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 46 - 0.00000 - - 0s 0 0 0.00000 0 32 - 0.00000 - - 0s 0 0 0.00000 0 197 - 0.00000 - - 1s 0 0 0.00000 0 284 - 0.00000 - - 1s 0 0 0.00000 0 157 - 0.00000 - - 2s 0 0 0.00000 0 152 - 0.00000 - - 3s 0 0 0.00000 0 150 - 0.00000 - - 4s 0 0 0.00000 0 153 - 0.00000 - - 5s 0 0 0.00000 0 145 - 0.00000 - - 5s 0 0 0.00000 0 171 - 0.00000 - - 6s 0 0 0.00000 0 190 - 0.00000 - - 7s 0 0 0.00000 0 190 - 0.00000 - - 7s 0 2 0.00000 0 190 - 0.00000 - - 8s 42 6 0.00000 8 179 - 0.00000 - 211 10s Cutting planes: Clique: 125 Zero half: 10 Explored 131 nodes (67774 simplex iterations) in 11.98 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 10