Models: 143 MINLPs from the GAMS MINLPLib that can be managed by both solvers (i.e., no trigonometric functions, no SOS or semicontinuous variable, below var/equ.-limit of Gams/LindoGlobal licence), only 38 of the models are convex

Solvers:

1. BARON-1: BARON 8.1.5 (as in GAMS 22.8.1) with optionfile

   epsr 0.01
   contol 1e-6
   maxtime 3600
   

2. BARON-2: BARON 8.1.5 (as in GAMS 22.8.1) with optionfile

   epsr 0.01
   contol 1e-6
   maxtime 3600
   PEnd 10
   PDo 100
   

   (the latter two options reduce the amount of probing)
3. LINDOGLOBAL 5.0.1.292 (as in GAMS 22.8.1) with optionfile

   SOLVER_FEASTOL 1e-6
   

• CONOPT 3.14S (as in GAMS 22.8.1)
• CPLEX 11.1.1 (as in GAMS 22.8.1)

Timelimit: 3600 seconds
Gap tolerance: 1%

Platform:

• Intel Core 2 Duo CPU T9300, 2.5 GHz, 4 GB RAM
• Linux 2.6.22.18, SuSE Linux 10.3, 32 Bit

The following modifications on the generated tracefiles have been made manually:

• LINDOGLOBAL: The model status had been changed from optimal (1) to integer feasible (8) if the gap (objective value - objective estimate) was nonzero. The objective estimate was set to NA if it contradicted the optimal value reported by another solver.

Results