I'm solving a large instance using Gurobi 7.0, 64-bit version on machine with 16GB of RAM. Gurobi is stuck at the start and all the memory is exhausted. Here is the output:
5378534 variables, all binary 16140318 constraints, all linear; 319218593 nonzeros 77 equality constraints 16140241 inequality constraints 1 linear objective; 4842072 nonzeros. #presolve 75.2705 1006633000 20529205440 #output 200.524 268435464 20797640904 Gurobi 7.0.0: timelim=3600 threads=2 nodefilestart=0.5 outlev 1 Optimize a model with 16140318 rows, 5378534 columns and 319218593 nonzeros Variable types: 0 continuous, 5378534 integer (5378534 binary) Coefficient statistics: Matrix range [1e+00, 1e+03] Objective range [1e+00, 4e+03] Bounds range [1e+00, 1e+00] RHS range [1e+00, 7e+04] Found heuristic solution: objective -0
I was expecting out of memory error, but Gurobi is just stuck for hours, and CPU usage is 0.
Is this normal behavior for this instance size? Why am I not getting any errors?