current bounds on the number of colors: 0 -- 53 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:23:44 2012 Optimize a model with 17941 rows, 2066 columns and 55042 nonzeros Presolve time: 0.07s Presolved: 17941 rows, 2066 columns, 55042 nonzeros Variable types: 0 continuous, 2066 integer (2066 binary) Root relaxation: objective 0.000000e+00, 134 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 (491 simplex iterations) in 0.13 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 18:23:44 2012 Optimize a model with 8997 rows, 1377 columns and 27521 nonzeros Presolve time: 0.03s Presolved: 8997 rows, 1377 columns, 27521 nonzeros Variable types: 0 continuous, 1377 integer (1377 binary) Root relaxation: objective 0.000000e+00, 114 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 26 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (950 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 18:23:44 2012 Optimize a model with 4181 rows, 1006 columns and 12702 nonzeros Presolve time: 0.01s Presolved: 4181 rows, 1006 columns, 12702 nonzeros Variable types: 0 continuous, 1006 integer (1006 binary) Root relaxation: objective 0.000000e+00, 106 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 76 - 0.00000 - - 0s 0 0 0.00000 0 102 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2030 simplex iterations) in 0.35 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 18:23:45 2012 Optimize a model with 6245 rows, 1165 columns and 19053 nonzeros Presolve time: 0.02s Presolved: 6245 rows, 1165 columns, 19053 nonzeros Variable types: 0 continuous, 1165 integer (1165 binary) Root relaxation: objective 0.000000e+00, 114 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 34 - 0.00000 - - 0s 0 0 0.00000 0 26 - 0.00000 - - 0s 0 0 0.00000 0 150 - 0.00000 - - 1s 0 0 0.00000 0 200 - 0.00000 - - 1s 0 0 0.00000 0 146 - 0.00000 - - 1s 0 0 0.00000 0 169 - 0.00000 - - 2s 0 0 0.00000 0 144 - 0.00000 - - 3s 0 0 0.00000 0 145 - 0.00000 - - 4s 0 0 0.00000 0 118 - 0.00000 - - 4s 0 0 0.00000 0 175 - 0.00000 - - 5s 0 0 0.00000 0 161 - 0.00000 - - 6s 0 0 0.00000 0 143 - 0.00000 - - 6s 0 0 0.00000 0 169 - 0.00000 - - 7s 0 0 0.00000 0 169 - 0.00000 - - 7s 0 2 0.00000 0 169 - 0.00000 - - 8s 97 17 0.00000 12 154 - 0.00000 - 134 10s 658 8 0.00000 9 145 - 0.00000 - 115 15s Cutting planes: Clique: 164 Zero half: 1 Explored 955 nodes (163341 simplex iterations) in 18.50 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: 9 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:24:03 2012 Optimize a model with 7621 rows, 1271 columns and 23287 nonzeros Presolve time: 0.02s Presolved: 7621 rows, 1271 columns, 23287 nonzeros Variable types: 0 continuous, 1271 integer (1271 binary) Root relaxation: objective 0.000000e+00, 116 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 36 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1026 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: 9 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:24:03 2012 Optimize a model with 6933 rows, 1218 columns and 21170 nonzeros Presolve time: 0.02s Presolved: 6933 rows, 1218 columns, 21170 nonzeros Variable types: 0 continuous, 1218 integer (1218 binary) Root relaxation: objective 0.000000e+00, 114 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 26 - 0.00000 - - 0s 0 0 0.00000 0 39 - 0.00000 - - 0s 0 0 0.00000 0 98 - 0.00000 - - 0s 0 0 0.00000 0 207 - 0.00000 - - 1s 0 0 0.00000 0 39 - 0.00000 - - 1s 0 0 0.00000 0 37 - 0.00000 - - 2s 0 0 0.00000 0 14 - 0.00000 - - 2s H 0 0 0.0000000 0.00000 0.0% - 2s Cutting planes: Clique: 3 Zero half: 6 Explored 0 nodes (18490 simplex iterations) in 2.58 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