current bounds on the number of colors: 0 -- 121 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:18:17 2012 Optimize a model with 43981 rows, 7991 columns and 138840 nonzeros Presolve time: 0.16s Presolved: 43981 rows, 7991 columns, 138840 nonzeros Variable types: 0 continuous, 7991 integer (7991 binary) Root relaxation: objective 0.000000e+00, 292 iterations, 0.05 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 (678 simplex iterations) in 0.30 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 -- 60 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:18:18 2012 Optimize a model with 22051 rows, 4361 columns and 69420 nonzeros Presolve time: 0.10s Presolved: 22051 rows, 4361 columns, 69420 nonzeros Variable types: 0 continuous, 4361 integer (4361 binary) Root relaxation: objective 0.000000e+00, 283 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 (553 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 -- 30 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:18:18 2012 Optimize a model with 11086 rows, 2546 columns and 34710 nonzeros Presolve time: 0.04s Presolved: 11086 rows, 2546 columns, 34710 nonzeros Variable types: 0 continuous, 2546 integer (2546 binary) Root relaxation: objective 0.000000e+00, 244 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 (480 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 -- 15 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:18:18 2012 Optimize a model with 5238 rows, 1578 columns and 16198 nonzeros Presolve time: 0.01s Presolved: 5238 rows, 1578 columns, 16198 nonzeros Variable types: 0 continuous, 1578 integer (1578 binary) Root relaxation: objective 0.000000e+00, 252 iterations, 0.00 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 (1404 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 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:18:18 2012 Optimize a model with 2314 rows, 1094 columns and 6942 nonzeros Presolve time: 0.01s Presolved: 2314 rows, 1094 columns, 6942 nonzeros Variable types: 0 continuous, 1094 integer (1094 binary) Root relaxation: objective 0.000000e+00, 259 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 0 242 - 0.00000 - - 0s 0 0 0.00000 0 260 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3820 simplex iterations) in 0.42 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: 3 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:18:19 2012 Optimize a model with 3776 rows, 1336 columns and 11570 nonzeros Presolve time: 0.01s Presolved: 3776 rows, 1336 columns, 11570 nonzeros Variable types: 0 continuous, 1336 integer (1336 binary) Root relaxation: objective 0.000000e+00, 263 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 0 236 - 0.00000 - - 0s 0 0 0.00000 0 212 - 0.00000 - - 0s 0 0 0.00000 0 328 - 0.00000 - - 0s 0 0 0.00000 0 357 - 0.00000 - - 0s 0 0 0.00000 0 168 - 0.00000 - - 1s 0 0 0.00000 0 230 - 0.00000 - - 1s 0 0 0.00000 0 252 - 0.00000 - - 1s 0 0 0.00000 0 252 - 0.00000 - - 2s 0 2 0.00000 0 252 - 0.00000 - - 2s 583 117 0.00000 14 257 - 0.00000 - 80.5 5s 610 138 0.00000 19 110 - 0.00000 - 78.9 10s 669 153 0.00000 19 272 - 0.00000 - 131 15s * 714 103 26 0.0000000 0.00000 0.0% 135 15s Cutting planes: Clique: 2 Zero half: 4 Explored 715 nodes (113891 simplex iterations) in 15.80 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:18:35 2012 Optimize a model with 3045 rows, 1215 columns and 9256 nonzeros Presolve time: 0.01s Presolved: 3045 rows, 1215 columns, 9256 nonzeros Variable types: 0 continuous, 1215 integer (1215 binary) Root relaxation: objective 0.000000e+00, 263 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 0 238 - 0.00000 - - 0s 0 0 0.00000 0 218 - 0.00000 - - 0s 0 0 0.00000 0 335 - 0.00000 - - 0s 0 0 0.00000 0 364 - 0.00000 - - 1s 0 0 0.00000 0 354 - 0.00000 - - 1s 0 0 0.00000 0 346 - 0.00000 - - 2s 0 0 0.00000 0 338 - 0.00000 - - 3s 0 0 0.00000 0 356 - 0.00000 - - 3s 0 0 0.00000 0 338 - 0.00000 - - 4s 0 0 0.00000 0 333 - 0.00000 - - 5s 0 0 0.00000 0 333 - 0.00000 - - 6s 0 0 0.00000 0 342 - 0.00000 - - 6s 0 0 0.00000 0 342 - 0.00000 - - 6s 0 2 0.00000 0 342 - 0.00000 - - 7s Cutting planes: Clique: 9 Zero half: 14 Explored 11 nodes (36689 simplex iterations) in 7.72 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 5