current bounds on the number of colors: 0 -- 55 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:40:28 2012 Optimize a model with 21088 rows, 2264 columns and 64584 nonzeros Presolve time: 0.09s Presolved: 21088 rows, 2264 columns, 64584 nonzeros Variable types: 0 continuous, 2264 integer (2264 binary) Root relaxation: objective 0.000000e+00, 157 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 (614 simplex iterations) in 0.17 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 18:40:29 2012 Optimize a model with 10182 rows, 1494 columns and 31096 nonzeros Presolve time: 0.03s Presolved: 10182 rows, 1494 columns, 31096 nonzeros Variable types: 0 continuous, 1494 integer (1494 binary) Root relaxation: objective 0.000000e+00, 118 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 42 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1190 simplex iterations) in 0.12 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 18:40:29 2012 Optimize a model with 4729 rows, 1109 columns and 14352 nonzeros Presolve time: 0.01s Presolved: 4729 rows, 1109 columns, 14352 nonzeros Variable types: 0 continuous, 1109 integer (1109 binary) Root relaxation: objective 0.000000e+00, 111 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 68 - 0.00000 - - 0s 0 0 0.00000 0 101 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2675 simplex iterations) in 0.39 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 18:40:29 2012 Optimize a model with 7066 rows, 1274 columns and 21528 nonzeros Presolve time: 0.02s Presolved: 7066 rows, 1274 columns, 21528 nonzeros Variable types: 0 continuous, 1274 integer (1274 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 0 110 - 0.00000 - - 0s 0 0 0.00000 0 30 - 0.00000 - - 0s 0 0 0.00000 0 186 - 0.00000 - - 1s 0 0 0.00000 0 283 - 0.00000 - - 1s 0 0 0.00000 0 175 - 0.00000 - - 3s 0 0 0.00000 0 190 - 0.00000 - - 4s 0 0 0.00000 0 251 - 0.00000 - - 5s 0 0 0.00000 0 260 - 0.00000 - - 6s 0 0 0.00000 0 253 - 0.00000 - - 6s 0 2 0.00000 0 253 - 0.00000 - - 7s 96 6 0.00000 7 196 - 0.00000 - 205 10s Cutting planes: Clique: 158 Zero half: 2 Explored 147 nodes (62045 simplex iterations) in 11.12 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 18:40:41 2012 Optimize a model with 8624 rows, 1384 columns and 26312 nonzeros Presolve time: 0.02s Presolved: 8624 rows, 1384 columns, 26312 nonzeros Variable types: 0 continuous, 1384 integer (1384 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 38 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 2 Clique: 29 Zero half: 24 Explored 0 nodes (1267 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: 9 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:40:41 2012 Optimize a model with 7845 rows, 1329 columns and 23920 nonzeros Presolve time: 0.02s Presolved: 7845 rows, 1329 columns, 23920 nonzeros Variable types: 0 continuous, 1329 integer (1329 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 0 110 - 0.00000 - - 0s 0 0 0.00000 0 20 - 0.00000 - - 0s 0 0 0.00000 0 129 - 0.00000 - - 1s 0 0 0.00000 0 144 - 0.00000 - - 1s 0 0 0.00000 0 22 - 0.00000 - - 2s 0 0 0.00000 0 157 - 0.00000 - - 2s 0 0 0.00000 0 164 - 0.00000 - - 3s 0 0 0.00000 0 167 - 0.00000 - - 4s 0 0 0.00000 0 167 - 0.00000 - - 4s 0 2 0.00000 0 152 - 0.00000 - - 5s 477 66 infeasible 23 - 0.00000 - 98.7 10s * 715 3 17 0.0000000 0.00000 0.0% 88.7 11s Cutting planes: Clique: 45 Zero half: 10 Explored 716 nodes (88318 simplex iterations) in 11.10 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% optimal solution found: number of colors: 10