current bounds on the number of colors: 0 -- 108 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:01:15 2012 Optimize a model with 30888 rows, 6402 columns and 98172 nonzeros Presolve time: 0.14s Presolved: 30888 rows, 6402 columns, 98172 nonzeros Variable types: 0 continuous, 6402 integer (6402 binary) Root relaxation: objective 0.000000e+00, 410 iterations, 0.03 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 (707 simplex iterations) in 0.22 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 -- 54 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:01:16 2012 Optimize a model with 15498 rows, 3486 columns and 49086 nonzeros Presolve time: 0.07s Presolved: 15498 rows, 3486 columns, 49086 nonzeros Variable types: 0 continuous, 3486 integer (3486 binary) Root relaxation: objective 0.000000e+00, 286 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 (525 simplex iterations) in 0.09 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 -- 27 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:01:16 2012 Optimize a model with 7518 rows, 1974 columns and 23634 nonzeros Presolve time: 0.02s Presolved: 7518 rows, 1974 columns, 23634 nonzeros Variable types: 0 continuous, 1974 integer (1974 binary) Root relaxation: objective 0.000000e+00, 229 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 (556 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 20:01:16 2012 Optimize a model with 3528 rows, 1218 columns and 10908 nonzeros Presolve time: 0.01s Presolved: 3528 rows, 1218 columns, 10908 nonzeros Variable types: 0 continuous, 1218 integer (1218 binary) Root relaxation: objective 0.000000e+00, 231 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 (976 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:01:16 2012 Optimize a model with 1818 rows, 894 columns and 5454 nonzeros Presolve time: 0.00s Presolved: 1818 rows, 894 columns, 5454 nonzeros Variable types: 0 continuous, 894 integer (894 binary) Root relaxation: objective 0.000000e+00, 236 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 0 216 - 0.00000 - - 0s 0 0 0.00000 0 214 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2673 simplex iterations) in 0.26 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:01:17 2012 Optimize a model with 2388 rows, 1002 columns and 7272 nonzeros Presolve time: 0.01s Presolved: 2388 rows, 1002 columns, 7272 nonzeros Variable types: 0 continuous, 1002 integer (1002 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 0 214 - 0.00000 - - 0s 0 0 0.00000 0 216 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 293 - 0.00000 - - 0s 0 0 0.00000 0 288 - 0.00000 - - 0s 0 0 0.00000 0 283 - 0.00000 - - 1s 0 0 0.00000 0 280 - 0.00000 - - 1s 0 0 0.00000 0 248 - 0.00000 - - 1s 0 0 0.00000 0 298 - 0.00000 - - 2s 0 0 0.00000 0 302 - 0.00000 - - 2s 0 0 0.00000 0 295 - 0.00000 - - 2s 0 0 0.00000 0 311 - 0.00000 - - 2s 0 0 0.00000 0 311 - 0.00000 - - 3s 0 2 0.00000 0 311 - 0.00000 - - 3s 220 8 infeasible 12 - 0.00000 - 117 5s Cutting planes: Gomory: 1 Clique: 15 Zero half: 52 Explored 413 nodes (73013 simplex iterations) in 6.50 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: 4 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:01:23 2012 Optimize a model with 2958 rows, 1110 columns and 9090 nonzeros Presolve time: 0.01s Presolved: 2958 rows, 1110 columns, 9090 nonzeros Variable types: 0 continuous, 1110 integer (1110 binary) Root relaxation: objective 0.000000e+00, 223 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 0 196 - 0.00000 - - 0s 0 0 0.00000 0 196 - 0.00000 - - 0s 0 0 0.00000 0 169 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (4459 simplex iterations) in 0.33 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% optimal solution found: number of colors: 5