test_optmn.c running 
f2 search value = 0.00144044 at: 
x[0] = 0.368421 
x[1] = -0.578947 
dx[0]=0.04 
cnt=0, v1=0.00144044, vb=0.000514127 
x[0]=0.408421, raw dxv[0]=0 
x[1]=-0.578947, raw dxv[1]=0 
f2 optimim value = 0.00144044 at: 
x[0] = 0.408421 
x[1] = -0.578947 
f3 search value = 0.41 at: 
x[0] = 0 
x[1] = -1 
x[2] = 0 
dx[0]=0.04 
cnt=0, v1=0.41, vb=0.3796 
x[0]=0.04, raw dxv[0]=0 
x[1]=-1, raw dxv[1]=0 
x[2]=0, raw dxv[2]=2.122e-314 
f3 optimim value = 0.41 at: 
x[0] = 0.04 
x[1] = -1 
x[2] = 0 
f4 search value = 0.5 at: 
x[0] = 0 
x[1] = -1 
x[2] = 0 
x[3] = 1 
dx[0]=0.04 
cnt=0, v1=0.5, vb=0.4696 
x[0]=0.04, raw dxv[0]=0 
x[1]=-1, raw dxv[1]=0 
x[2]=0, raw dxv[2]=2.122e-314 
x[3]=1, raw dxv[3]=2.11539 
k=0, v1=0.4696, vxl=0.8696, vxh=0.4696 
x[0]=0.04, dxv[0]=0 
x[1]=-1, dxv[1]=0 
x[2]=1.00312e-314, dxv[2]=2.00625e-314 
x[3]=1, dxv[3]=2 
k=1, v1=0.4696, vxl=3.2696, vxh=0.4696 
x[0]=0.04, dxv[0]=0 
x[1]=-1, dxv[1]=0 
x[2]=1.00312e-314, dxv[2]=1.00312e-314 
x[3]=1, dxv[3]=1 
k=2, v1=0.4696, vxl=0.8696, vxh=0.4696 
x[0]=0.04, dxv[0]=0 
x[1]=-1, dxv[1]=0 
x[2]=1.00312e-314, dxv[2]=5.01562e-315 
x[3]=1, dxv[3]=0.5 
k=3, v1=0.4196, vxl=0.4196, vxh=0.4696 
x[0]=0.04, dxv[0]=0 
x[1]=-1, dxv[1]=0 
x[2]=5.01562e-315, dxv[2]=1.00312e-314 
x[3]=0.5, dxv[3]=1 
k=4, v1=0.4196, vxl=1.8196, vxh=0.4696 
x[0]=0.04, dxv[0]=0 
x[1]=-1, dxv[1]=0 
x[2]=5.01562e-315, dxv[2]=5.01562e-315 
x[3]=0.5, dxv[3]=0.5 
f4 optimim value = 0.4196 at: 
x[0] = 0.04 
x[1] = -1 
x[2] = 5.01562e-315 
x[3] = 0.5