current bounds on the number of colors: 0 -- 103 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:54:42 2012 Optimize a model with 26011 rows, 5761 columns and 82977 nonzeros Presolve time: 0.13s Presolved: 26011 rows, 5761 columns, 82977 nonzeros Variable types: 0 continuous, 5761 integer (5761 binary) Root relaxation: objective 0.000000e+00, 296 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 (494 simplex iterations) in 0.18 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 -- 51 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:54:43 2012 Optimize a model with 12803 rows, 3083 columns and 40675 nonzeros Presolve time: 0.05s Presolved: 12803 rows, 3083 columns, 40675 nonzeros Variable types: 0 continuous, 3083 integer (3083 binary) Root relaxation: objective 0.000000e+00, 253 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 (452 simplex iterations) in 0.08 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 -- 25 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:54:43 2012 Optimize a model with 6199 rows, 1744 columns and 19524 nonzeros Presolve time: 0.02s Presolved: 6199 rows, 1744 columns, 19524 nonzeros Variable types: 0 continuous, 1744 integer (1744 binary) Root relaxation: objective 0.000000e+00, 221 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 (419 simplex iterations) in 0.03 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:54:43 2012 Optimize a model with 3151 rows, 1126 columns and 9762 nonzeros Presolve time: 0.01s Presolved: 3151 rows, 1126 columns, 9762 nonzeros Variable types: 0 continuous, 1126 integer (1126 binary) Root relaxation: objective 0.000000e+00, 221 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 (1119 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 19:54:43 2012 Optimize a model with 1627 rows, 817 columns and 4881 nonzeros Presolve time: 0.00s Presolved: 1627 rows, 817 columns, 4881 nonzeros Variable types: 0 continuous, 817 integer (817 binary) Root relaxation: objective 0.000000e+00, 228 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 0 204 - 0.00000 - - 0s 0 0 0.00000 0 202 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2482 simplex iterations) in 0.22 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 19:54:44 2012 Optimize a model with 2135 rows, 920 columns and 6508 nonzeros Presolve time: 0.01s Presolved: 2135 rows, 920 columns, 6508 nonzeros Variable types: 0 continuous, 920 integer (920 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 0.00000 0 114 - 0.00000 - - 0s 0 0 0.00000 0 205 - 0.00000 - - 0s 0 0 0.00000 0 207 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 284 - 0.00000 - - 0s 0 0 0.00000 0 278 - 0.00000 - - 1s 0 0 0.00000 0 172 - 0.00000 - - 1s 0 0 0.00000 0 286 - 0.00000 - - 1s 0 0 0.00000 0 282 - 0.00000 - - 1s 0 0 0.00000 0 270 - 0.00000 - - 2s 0 0 0.00000 0 266 - 0.00000 - - 2s 0 0 0.00000 0 261 - 0.00000 - - 2s 0 0 0.00000 0 252 - 0.00000 - - 2s 0 0 0.00000 0 261 - 0.00000 - - 3s 0 0 0.00000 0 260 - 0.00000 - - 3s 0 2 0.00000 0 257 - 0.00000 - - 3s Cutting planes: Clique: 10 Zero half: 42 Explored 105 nodes (38983 simplex iterations) in 3.98 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 19:54:48 2012 Optimize a model with 2643 rows, 1023 columns and 8135 nonzeros Presolve time: 0.01s Presolved: 2643 rows, 1023 columns, 8135 nonzeros Variable types: 0 continuous, 1023 integer (1023 binary) Root relaxation: objective 0.000000e+00, 222 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 (991 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% optimal solution found: number of colors: 5