current bounds on the number of colors: 0 -- 52 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:23:31 2012 Optimize a model with 17316 rows, 2016 columns and 53144 nonzeros Presolve time: 0.07s Presolved: 17316 rows, 2016 columns, 53144 nonzeros Variable types: 0 continuous, 2016 integer (2016 binary) Root relaxation: objective 0.000000e+00, 129 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 (342 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 18:23:32 2012 Optimize a model with 8684 rows, 1340 columns and 26572 nonzeros Presolve time: 0.03s Presolved: 8684 rows, 1340 columns, 26572 nonzeros Variable types: 0 continuous, 1340 integer (1340 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1137 simplex iterations) in 0.10 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 18:23:32 2012 Optimize a model with 4036 rows, 976 columns and 12264 nonzeros Presolve time: 0.01s Presolved: 4036 rows, 976 columns, 12264 nonzeros Variable types: 0 continuous, 976 integer (976 binary) Root relaxation: objective 0.000000e+00, 109 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 90 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1958 simplex iterations) in 0.27 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 18:23:32 2012 Optimize a model with 6028 rows, 1132 columns and 18396 nonzeros Presolve time: 0.02s Presolved: 6028 rows, 1132 columns, 18396 nonzeros Variable types: 0 continuous, 1132 integer (1132 binary) Root relaxation: objective 0.000000e+00, 107 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 56 - 0.00000 - - 0s 0 0 0.00000 0 48 - 0.00000 - - 0s 0 0 0.00000 0 18 - 0.00000 - - 0s 0 0 0.00000 0 243 - 0.00000 - - 0s 0 0 0.00000 0 22 - 0.00000 - - 1s 0 0 0.00000 0 24 - 0.00000 - - 1s 0 0 0.00000 0 88 - 0.00000 - - 1s 0 0 0.00000 0 22 - 0.00000 - - 2s 0 0 0.00000 0 18 - 0.00000 - - 2s 0 0 0.00000 0 110 - 0.00000 - - 2s 0 0 0.00000 0 35 - 0.00000 - - 3s 0 0 0.00000 0 20 - 0.00000 - - 3s 0 0 0.00000 0 95 - 0.00000 - - 3s 0 0 0.00000 0 95 - 0.00000 - - 4s 0 2 0.00000 0 95 - 0.00000 - - 5s 365 10 0.00000 15 144 - 0.00000 - 111 10s Cutting planes: Clique: 16 Zero half: 4 Explored 410 nodes (78578 simplex iterations) in 10.46 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: 9 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:23:43 2012 Optimize a model with 7356 rows, 1236 columns and 22484 nonzeros Presolve time: 0.02s Presolved: 7356 rows, 1236 columns, 22484 nonzeros Variable types: 0 continuous, 1236 integer (1236 binary) Root relaxation: objective 0.000000e+00, 120 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 27 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1303 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: 9 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:23:43 2012 Optimize a model with 6692 rows, 1184 columns and 20440 nonzeros Presolve time: 0.02s Presolved: 6692 rows, 1184 columns, 20440 nonzeros Variable types: 0 continuous, 1184 integer (1184 binary) Root relaxation: objective 0.000000e+00, 117 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 43 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1329 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% optimal solution found: number of colors: 10