current bounds on the number of colors: 0 -- 53 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:24:06 2012 Optimize a model with 17239 rows, 2039 columns and 52936 nonzeros Presolve time: 0.07s Presolved: 17239 rows, 2039 columns, 52936 nonzeros Variable types: 0 continuous, 2039 integer (2039 binary) Root relaxation: objective 0.000000e+00, 154 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 (367 simplex iterations) in 0.11 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 -- 26 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:24:07 2012 Optimize a model with 8646 rows, 1350 columns and 26468 nonzeros Presolve time: 0.03s Presolved: 8646 rows, 1350 columns, 26468 nonzeros Variable types: 0 continuous, 1350 integer (1350 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 (372 simplex iterations) in 0.05 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:24:07 2012 Optimize a model with 4019 rows, 979 columns and 12216 nonzeros Presolve time: 0.01s Presolved: 4019 rows, 979 columns, 12216 nonzeros Variable types: 0 continuous, 979 integer (979 binary) Root relaxation: objective 0.000000e+00, 106 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 96 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2054 simplex iterations) in 0.28 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:24:07 2012 Optimize a model with 6002 rows, 1138 columns and 18324 nonzeros Presolve time: 0.02s Presolved: 6002 rows, 1138 columns, 18324 nonzeros Variable types: 0 continuous, 1138 integer (1138 binary) Root relaxation: objective 0.000000e+00, 119 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 58 - 0.00000 - - 0s 0 0 0.00000 0 144 - 0.00000 - - 0s 0 0 0.00000 0 163 - 0.00000 - - 0s 0 0 0.00000 0 173 - 0.00000 - - 1s 0 0 0.00000 0 66 - 0.00000 - - 1s 0 0 0.00000 0 93 - 0.00000 - - 1s 0 0 0.00000 0 147 - 0.00000 - - 2s 0 0 0.00000 0 146 - 0.00000 - - 3s 0 0 0.00000 0 87 - 0.00000 - - 3s 0 0 0.00000 0 98 - 0.00000 - - 3s 0 0 0.00000 0 98 - 0.00000 - - 4s 0 2 0.00000 0 98 - 0.00000 - - 4s 2 3 0.00000 1 178 - 0.00000 - 792 5s 604 30 0.00000 19 185 - 0.00000 - 72.6 10s 609 33 0.00000 21 165 - 0.00000 - 72.0 15s 615 39 0.00000 15 185 - 0.00000 - 129 20s 1017 14 infeasible 29 - 0.00000 - 125 25s 1654 67 0.00000 35 97 - 0.00000 - 120 30s * 1972 0 31 0.0000000 0.00000 0.0% 119 32s Cutting planes: Clique: 37 Zero half: 3 Explored 1973 nodes (264978 simplex iterations) in 32.35 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: 6 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:24:40 2012 Optimize a model with 4680 rows, 1032 columns and 14252 nonzeros Presolve time: 0.01s Presolved: 4680 rows, 1032 columns, 14252 nonzeros Variable types: 0 continuous, 1032 integer (1032 binary) Root relaxation: objective 0.000000e+00, 110 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 56 - 0.00000 - - 0s 0 0 0.00000 0 48 - 0.00000 - - 0s 0 0 0.00000 0 252 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 1s 0 0 0.00000 0 274 - 0.00000 - - 1s 0 0 0.00000 0 263 - 0.00000 - - 3s 0 0 0.00000 0 272 - 0.00000 - - 3s 0 0 0.00000 0 279 - 0.00000 - - 4s 0 0 0.00000 0 279 - 0.00000 - - 4s 0 2 0.00000 0 279 - 0.00000 - - 5s Cutting planes: Clique: 92 Zero half: 7 Explored 7 nodes (30576 simplex iterations) in 6.03 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: 7 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:24:46 2012 Optimize a model with 5341 rows, 1085 columns and 16288 nonzeros Presolve time: 0.01s Presolved: 5341 rows, 1085 columns, 16288 nonzeros Variable types: 0 continuous, 1085 integer (1085 binary) Root relaxation: objective 0.000000e+00, 107 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 70 - 0.00000 - - 0s 0 0 0.00000 0 36 - 0.00000 - - 0s 0 0 0.00000 0 201 - 0.00000 - - 0s 0 0 0.00000 0 226 - 0.00000 - - 0s 0 0 0.00000 0 183 - 0.00000 - - 1s 0 0 0.00000 0 205 - 0.00000 - - 2s 0 0 0.00000 0 201 - 0.00000 - - 3s 0 0 0.00000 0 200 - 0.00000 - - 4s 0 0 0.00000 0 240 - 0.00000 - - 5s 0 0 0.00000 0 240 - 0.00000 - - 5s 0 2 0.00000 0 240 - 0.00000 - - 5s Cutting planes: Clique: 170 Zero half: 2 Explored 189 nodes (62885 simplex iterations) in 8.88 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 9