current bounds on the number of colors: 0 -- 121 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:21:45 2012 Optimize a model with 44761 rows, 8004 columns and 141180 nonzeros Presolve time: 0.17s Presolved: 44761 rows, 8004 columns, 141180 nonzeros Variable types: 0 continuous, 8004 integer (8004 binary) Root relaxation: objective 0.000000e+00, 311 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 (576 simplex iterations) in 0.28 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 21:21:46 2012 Optimize a model with 22441 rows, 4374 columns and 70590 nonzeros Presolve time: 0.10s Presolved: 22441 rows, 4374 columns, 70590 nonzeros Variable types: 0 continuous, 4374 integer (4374 binary) Root relaxation: objective 0.000000e+00, 292 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 (556 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 21:21:47 2012 Optimize a model with 11281 rows, 2559 columns and 35295 nonzeros Presolve time: 0.04s Presolved: 11281 rows, 2559 columns, 35295 nonzeros Variable types: 0 continuous, 2559 integer (2559 binary) Root relaxation: objective 0.000000e+00, 254 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 (491 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 21:21:47 2012 Optimize a model with 5329 rows, 1591 columns and 16471 nonzeros Presolve time: 0.01s Presolved: 5329 rows, 1591 columns, 16471 nonzeros Variable types: 0 continuous, 1591 integer (1591 binary) Root relaxation: objective 0.000000e+00, 255 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 (854 simplex iterations) in 0.04 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 21:21:47 2012 Optimize a model with 2353 rows, 1107 columns and 7059 nonzeros Presolve time: 0.01s Presolved: 2353 rows, 1107 columns, 7059 nonzeros Variable types: 0 continuous, 1107 integer (1107 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 0 273 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (4432 simplex iterations) in 0.52 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 21:21:48 2012 Optimize a model with 3841 rows, 1349 columns and 11765 nonzeros Presolve time: 0.01s Presolved: 3841 rows, 1349 columns, 11765 nonzeros Variable types: 0 continuous, 1349 integer (1349 binary) Root relaxation: objective 0.000000e+00, 258 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 0 226 - 0.00000 - - 0s 0 0 0.00000 0 177 - 0.00000 - - 0s 0 0 0.00000 0 210 - 0.00000 - - 0s 0 0 0.00000 0 321 - 0.00000 - - 0s 0 0 0.00000 0 204 - 0.00000 - - 1s 0 0 0.00000 0 198 - 0.00000 - - 1s 0 0 0.00000 0 198 - 0.00000 - - 1s 0 0 0.00000 0 190 - 0.00000 - - 1s 0 0 0.00000 0 190 - 0.00000 - - 2s 0 0 0.00000 0 166 - 0.00000 - - 2s 0 0 0.00000 0 224 - 0.00000 - - 2s 0 0 0.00000 0 248 - 0.00000 - - 3s 0 0 0.00000 0 248 - 0.00000 - - 3s 0 2 0.00000 0 248 - 0.00000 - - 3s 220 33 0.00000 22 204 - 0.00000 - 91.4 5s 808 49 0.00000 14 261 - 0.00000 - 75.6 10s 816 55 0.00000 22 231 - 0.00000 - 74.8 15s 1255 90 infeasible 37 - 0.00000 - 130 20s * 1682 2 30 0.0000000 0.00000 0.0% 140 24s Cutting planes: Clique: 3 Zero half: 9 Explored 1683 nodes (268787 simplex iterations) in 24.34 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 21:22:12 2012 Optimize a model with 3097 rows, 1228 columns and 9412 nonzeros Presolve time: 0.01s Presolved: 3097 rows, 1228 columns, 9412 nonzeros Variable types: 0 continuous, 1228 integer (1228 binary) Root relaxation: objective 0.000000e+00, 255 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 0 240 - 0.00000 - - 0s 0 0 0.00000 0 234 - 0.00000 - - 0s 0 0 0.00000 0 366 - 0.00000 - - 0s 0 0 0.00000 0 355 - 0.00000 - - 1s 0 0 0.00000 0 355 - 0.00000 - - 1s 0 0 0.00000 0 353 - 0.00000 - - 2s 0 0 0.00000 0 351 - 0.00000 - - 2s 0 0 0.00000 0 351 - 0.00000 - - 3s 0 0 0.00000 0 347 - 0.00000 - - 4s 0 0 0.00000 0 342 - 0.00000 - - 5s 0 0 0.00000 0 351 - 0.00000 - - 5s 0 0 0.00000 0 335 - 0.00000 - - 6s 0 0 0.00000 0 334 - 0.00000 - - 6s 0 0 0.00000 0 334 - 0.00000 - - 7s 0 0 0.00000 0 334 - 0.00000 - - 7s 0 2 0.00000 0 334 - 0.00000 - - 8s Cutting planes: Clique: 7 Zero half: 17 Explored 9 nodes (38482 simplex iterations) in 8.52 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