current bounds on the number of colors: 0 -- 57 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:08:56 2012 Optimize a model with 22233 rows, 2388 columns and 68124 nonzeros Presolve time: 0.09s Presolved: 22233 rows, 2388 columns, 68124 nonzeros Variable types: 0 continuous, 2388 integer (2388 binary) Root relaxation: objective 0.000000e+00, 151 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 (379 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 -- 28 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:08:56 2012 Optimize a model with 11145 rows, 1590 columns and 34062 nonzeros Presolve time: 0.03s Presolved: 11145 rows, 1590 columns, 34062 nonzeros Variable types: 0 continuous, 1590 integer (1590 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 22 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1512 simplex iterations) in 0.16 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 19:08:56 2012 Optimize a model with 5601 rows, 1191 columns and 17031 nonzeros Presolve time: 0.01s Presolved: 5601 rows, 1191 columns, 17031 nonzeros Variable types: 0 continuous, 1191 integer (1191 binary) Root relaxation: objective 0.000000e+00, 114 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 54 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3009 simplex iterations) in 0.47 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 19:08:57 2012 Optimize a model with 7977 rows, 1362 columns and 24330 nonzeros Presolve time: 0.02s Presolved: 7977 rows, 1362 columns, 24330 nonzeros Variable types: 0 continuous, 1362 integer (1362 binary) Root relaxation: objective 0.000000e+00, 129 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 62 - 0.00000 - - 0s 0 0 0.00000 0 47 - 0.00000 - - 0s 0 0 0.00000 0 137 - 0.00000 - - 1s 0 0 0.00000 0 227 - 0.00000 - - 1s 0 0 0.00000 0 94 - 0.00000 - - 2s 0 0 0.00000 0 67 - 0.00000 - - 3s 0 0 0.00000 0 165 - 0.00000 - - 3s 0 0 0.00000 0 185 - 0.00000 - - 4s 0 0 0.00000 0 165 - 0.00000 - - 5s 0 0 0.00000 0 137 - 0.00000 - - 6s 0 0 0.00000 0 168 - 0.00000 - - 6s 0 0 0.00000 0 168 - 0.00000 - - 7s 0 2 0.00000 0 168 - 0.00000 - - 8s 177 11 0.00000 16 92 - 0.00000 - 101 10s 1073 17 0.00000 20 107 - 0.00000 - 79.5 15s 1107 30 0.00000 10 82 - 0.00000 - 78.4 20s 1110 32 0.00000 15 100 - 0.00000 - 78.2 25s 1112 33 0.00000 17 110 - 0.00000 - 78.0 30s 1120 37 0.00000 17 135 - 0.00000 - 118 35s 1161 38 0.00000 20 172 - 0.00000 - 119 40s 1549 11 0.00000 20 168 - 0.00000 - 124 45s * 1751 0 28 0.0000000 0.00000 0.0% 126 47s Cutting planes: Clique: 25 Zero half: 3 Explored 1752 nodes (261030 simplex iterations) in 47.94 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 19:09:45 2012 Optimize a model with 6393 rows, 1248 columns and 19464 nonzeros Presolve time: 0.02s Presolved: 6393 rows, 1248 columns, 19464 nonzeros Variable types: 0 continuous, 1248 integer (1248 binary) Root relaxation: objective 0.000000e+00, 123 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 76 - 0.00000 - - 0s 0 0 0.00000 0 65 - 0.00000 - - 0s 0 0 0.00000 0 267 - 0.00000 - - 1s 0 0 0.00000 0 342 - 0.00000 - - 1s 0 0 0.00000 0 326 - 0.00000 - - 2s 0 0 0.00000 0 282 - 0.00000 - - 3s 0 0 0.00000 0 285 - 0.00000 - - 5s 0 0 0.00000 0 282 - 0.00000 - - 7s 0 0 0.00000 0 325 - 0.00000 - - 8s 0 0 0.00000 0 333 - 0.00000 - - 9s 0 0 0.00000 0 333 - 0.00000 - - 10s 0 2 0.00000 0 333 - 0.00000 - - 12s Cutting planes: Clique: 132 Zero half: 4 Explored 7 nodes (48013 simplex iterations) in 12.47 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 19:09:58 2012 Optimize a model with 7185 rows, 1305 columns and 21897 nonzeros Presolve time: 0.02s Presolved: 7185 rows, 1305 columns, 21897 nonzeros Variable types: 0 continuous, 1305 integer (1305 binary) Root relaxation: objective 0.000000e+00, 132 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 71 - 0.00000 - - 0s 0 0 0.00000 0 195 - 0.00000 - - 1s 0 0 0.00000 0 268 - 0.00000 - - 1s 0 0 0.00000 0 191 - 0.00000 - - 2s 0 0 0.00000 0 211 - 0.00000 - - 4s 0 0 0.00000 0 201 - 0.00000 - - 5s 0 0 0.00000 0 202 - 0.00000 - - 6s 0 0 0.00000 0 209 - 0.00000 - - 7s 0 0 0.00000 0 209 - 0.00000 - - 7s 0 2 0.00000 0 209 - 0.00000 - - 9s Cutting planes: Clique: 96 Zero half: 3 Explored 33 nodes (44980 simplex iterations) in 9.99 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