Infinite loop in ibwd

[sansolivier]

The following problem happens when I run the optimizer on robot.nl...

Example code:

double _box[][2]=
{{6746518849.1194171905517578125, 6746518851.2944488525390625} , {6746518849.1194171905517578125, 6746518851.707820892333984375} , {6746518849.1194171905517578125, 6746518851.51369571685791015625} , {6746518849.1194171905517578125, 6746518851.43162059783935546875} , {6746518849.1194171905517578125, 6746518850.9625072479248046875} , {6746518849.1194171905517578125, 6746518851.621601104736328125} , {6746518849.1194171905517578125, 6746518850.8931636810302734375}};
IntervalVector box(7,_box);
Function f("x[7]","((-(((((((cos(x(1))+cos(x(2)))+cos(x(3)))+cos(x(4)))+cos(x(5)))+cos(x(6)))+(0.5*cos(x(7))))-4))-1.00001e-08)");
f.ibwd(Interval(NEG_INFINITY,0),box);

[gchabert]

OK. Note: does not happen with gaol. The problem comes from my implementation of bwd_cos.