MINLPLib
A Library of Mixed-Integer and Continuous Nonlinear Programming Instances
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Removed Instance ex8_3_14
| Formatsⓘ | ams gms mod nl osil py |
| Primal Bounds (infeas ≤ 1e-08)ⓘ | |
| Other points (infeas > 1e-08)ⓘ | |
| Dual Boundsⓘ | -2.49863871 (ANTIGONE) -100.00000000 (BARON) -100.00000000 (COUENNE) -100.00000000 (LINDO) -100.00000000 (SCIP) |
| Referencesⓘ | Floudas, C A, Pardalos, Panos M, Adjiman, C S, Esposito, W R, Gumus, Zeynep H, Harding, S T, Klepeis, John L, Meyer, Clifford A, and Schweiger, C A, Handbook of Test Problems in Local and Global Optimization, Kluwer Academic Publishers, 1999. Schweiger, C A and Floudas, C A, Optimization Framework for the Synthesis of Chemical Reactor Networks, Industrial and Engineering Chemistry Research, 38:3, 1998, 744-766. |
| Sourceⓘ | Test Problem ex8.3.14 of Chapter 8 of Floudas e.a. handbook |
| Added to libraryⓘ | 31 Jul 2001 |
| Removed from libraryⓘ | 01 Mar 2022 |
| Removed becauseⓘ | Numerically difficult formulation (coefficient of order 1E16 in front of exp()) |
| Problem typeⓘ | NLP |
| #Variablesⓘ | 110 |
| #Binary Variablesⓘ | 0 |
| #Integer Variablesⓘ | 0 |
| #Nonlinear Variablesⓘ | 105 |
| #Nonlinear Binary Variablesⓘ | 0 |
| #Nonlinear Integer Variablesⓘ | 0 |
| Objective Senseⓘ | min |
| Objective typeⓘ | linear |
| Objective curvatureⓘ | linear |
| #Nonzeros in Objectiveⓘ | 1 |
| #Nonlinear Nonzeros in Objectiveⓘ | 0 |
| #Constraintsⓘ | 71 |
| #Linear Constraintsⓘ | 17 |
| #Quadratic Constraintsⓘ | 44 |
| #Polynomial Constraintsⓘ | 0 |
| #Signomial Constraintsⓘ | 0 |
| #General Nonlinear Constraintsⓘ | 10 |
| Operands in Gen. Nonlin. Functionsⓘ | div exp mul vcpower |
| Constraints curvatureⓘ | indefinite |
| #Nonzeros in Jacobianⓘ | 579 |
| #Nonlinear Nonzeros in Jacobianⓘ | 463 |
| #Nonzeros in (Upper-Left) Hessian of Lagrangianⓘ | 473 |
| #Nonzeros in Diagonal of Hessian of Lagrangianⓘ | 25 |
| #Blocks in Hessian of Lagrangianⓘ | 16 |
| Minimal blocksize in Hessian of Lagrangianⓘ | 3 |
| Maximal blocksize in Hessian of Lagrangianⓘ | 12 |
| Average blocksize in Hessian of Lagrangianⓘ | 6.5625 |
| #Semicontinuitiesⓘ | 0 |
| #Nonlinear Semicontinuitiesⓘ | 0 |
| #SOS type 1ⓘ | 0 |
| #SOS type 2ⓘ | 0 |
| Minimal coefficientⓘ | 5.0000e-01 |
| Maximal coefficientⓘ | 2.7320e+16 |
| Infeasibility of initial pointⓘ | 1.366e+06 |
| Sparsity Jacobianⓘ |  |
| Sparsity Hessian of Lagrangianⓘ |  |
$offlisting
*
* Equation counts
* Total E G L N X C B
* 72 72 0 0 0 0 0 0
*
* Variable counts
* x b i s1s s2s sc si
* Total cont binary integer sos1 sos2 scont sint
* 111 111 0 0 0 0 0 0
* FX 0
*
* Nonzero counts
* Total const NL DLL
* 581 118 463 0
*
* Solve m using NLP minimizing objvar;
Variables objvar,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15,x16,x17,x18
,x19,x20,x21,x22,x23,x24,x25,x26,x27,x28,x29,x30,x31,x32,x33,x34,x35
,x36,x37,x38,x39,x40,x41,x42,x43,x44,x45,x46,x47,x48,x49,x50,x51,x52
,x53,x54,x55,x56,x57,x58,x59,x60,x61,x62,x63,x64,x65,x66,x67,x68,x69
,x70,x71,x72,x73,x74,x75,x76,x77,x78,x79,x80,x81,x82,x83,x84,x85,x86
,x87,x88,x89,x90,x91,x92,x93,x94,x95,x96,x97,x98,x99,x100,x101,x102
,x103,x104,x105,x106,x107,x108,x109,x110,x111;
Positive Variables x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15,x16,x17
,x18,x19,x20,x21,x22,x23,x24,x25,x26,x27,x28,x29,x30,x31,x32,x33,x34
,x35,x36,x37,x38,x39,x40,x41,x42,x43,x44,x45,x46,x47,x48,x49,x50,x51
,x52,x53,x54,x55,x56,x57,x58,x59,x60,x61,x62,x63,x64,x65,x66,x67,x68
,x69,x70,x71,x72,x73,x74,x75,x76,x77,x78,x79,x80,x81,x82,x83,x84,x85
,x86,x87,x88,x89,x90,x91,x92,x93,x94,x95,x96,x102,x103,x104,x105
,x106,x107,x108,x109,x110,x111;
Equations e1,e2,e3,e4,e5,e6,e7,e8,e9,e10,e11,e12,e13,e14,e15,e16,e17,e18,e19
,e20,e21,e22,e23,e24,e25,e26,e27,e28,e29,e30,e31,e32,e33,e34,e35,e36
,e37,e38,e39,e40,e41,e42,e43,e44,e45,e46,e47,e48,e49,e50,e51,e52,e53
,e54,e55,e56,e57,e58,e59,e60,e61,e62,e63,e64,e65,e66,e67,e68,e69,e70
,e71,e72;
e1.. - objvar - x90 =E= 0;
e2.. - x2 - x3 - x4 - x5 - x6 =E= -7731;
e3.. - x2 + x7 - x57 - x62 - x67 - x72 - x77 =E= 0;
e4.. - x3 + x8 - x58 - x63 - x68 - x73 - x78 =E= 0;
e5.. - x4 + x9 - x59 - x64 - x69 - x74 - x79 =E= 0;
e6.. - x5 + x10 - x60 - x65 - x70 - x75 - x80 =E= 0;
e7.. - x6 + x11 - x61 - x66 - x71 - x76 - x81 =E= 0;
e8.. x12*x7 - (x37*x57 + x41*x62 + x45*x67 + x49*x72 + x53*x77) - 2.5*x2 =E= 0;
e9.. x13*x7 - (x38*x57 + x42*x62 + x46*x67 + x50*x72 + x54*x77) - 3.46*x2 =E= 0
;
e10.. x14*x7 - (x39*x57 + x43*x62 + x47*x67 + x51*x72 + x55*x77) =E= 0;
e11.. x15*x7 - (x40*x57 + x44*x62 + x48*x67 + x52*x72 + x56*x77) - 26.05*x2
=E= 0;
e12.. x16*x8 - (x37*x58 + x41*x63 + x45*x68 + x49*x73 + x53*x78) - 2.5*x3 =E= 0
;
e13.. x17*x8 - (x38*x58 + x42*x63 + x46*x68 + x50*x73 + x54*x78) - 3.46*x3
=E= 0;
e14.. x18*x8 - (x39*x58 + x43*x63 + x47*x68 + x51*x73 + x55*x78) =E= 0;
e15.. x19*x8 - (x40*x58 + x44*x63 + x48*x68 + x52*x73 + x56*x78) - 26.05*x3
=E= 0;
e16.. x20*x9 - (x37*x59 + x41*x64 + x45*x69 + x49*x74 + x53*x79) - 2.5*x4 =E= 0
;
e17.. x21*x9 - (x38*x59 + x42*x64 + x46*x69 + x50*x74 + x54*x79) - 3.46*x4
=E= 0;
e18.. x22*x9 - (x39*x59 + x43*x64 + x47*x69 + x51*x74 + x55*x79) =E= 0;
e19.. x23*x9 - (x40*x59 + x44*x64 + x48*x69 + x52*x74 + x56*x79) - 26.05*x4
=E= 0;
e20.. x24*x10 - (x37*x60 + x41*x65 + x45*x70 + x49*x75 + x53*x80) - 2.5*x5
=E= 0;
e21.. x25*x10 - (x38*x60 + x42*x65 + x46*x70 + x50*x75 + x54*x80) - 3.46*x5
=E= 0;
e22.. x26*x10 - (x39*x60 + x43*x65 + x47*x70 + x51*x75 + x55*x80) =E= 0;
e23.. x27*x10 - (x40*x60 + x44*x65 + x48*x70 + x52*x75 + x56*x80) - 26.05*x5
=E= 0;
e24.. x28*x11 - (x37*x61 + x41*x66 + x45*x71 + x49*x76 + x53*x81) - 2.5*x6
=E= 0;
e25.. x29*x11 - (x38*x61 + x42*x66 + x46*x71 + x50*x76 + x54*x81) - 3.46*x6
=E= 0;
e26.. x30*x11 - (x39*x61 + x43*x66 + x47*x71 + x51*x76 + x55*x81) =E= 0;
e27.. x31*x11 - (x40*x61 + x44*x66 + x48*x71 + x52*x76 + x56*x81) - 26.05*x6
=E= 0;
e28.. - x7 + x32 =E= 0;
e29.. - x8 + x33 =E= 0;
e30.. - x9 + x34 =E= 0;
e31.. - x10 + x35 =E= 0;
e32.. - x11 + x36 =E= 0;
e33.. x37*x32 - (x12*x7 + x92*(x103 - x102)) =E= 0;
e34.. x38*x32 - (x13*x7 + x92*(0.5*x103 - 0.5*x102)) =E= 0;
e35.. x39*x32 - (x14*x7 + x92*(x102 - x103)) =E= 0;
e36.. x40*x32 - x15*x7 =E= 0;
e37.. x41*x33 - (x16*x8 + x93*(x105 - x104)) =E= 0;
e38.. x42*x33 - (x17*x8 + x93*(0.5*x105 - 0.5*x104)) =E= 0;
e39.. x43*x33 - (x18*x8 + x93*(x104 - x105)) =E= 0;
e40.. x44*x33 - x19*x8 =E= 0;
e41.. x45*x34 - (x20*x9 + x94*(x107 - x106)) =E= 0;
e42.. x46*x34 - (x21*x9 + x94*(0.5*x107 - 0.5*x106)) =E= 0;
e43.. x47*x34 - (x22*x9 + x94*(x106 - x107)) =E= 0;
e44.. x48*x34 - x23*x9 =E= 0;
e45.. x49*x35 - (x24*x10 + x95*(x109 - x108)) =E= 0;
e46.. x50*x35 - (x25*x10 + x95*(0.5*x109 - 0.5*x108)) =E= 0;
e47.. x51*x35 - (x26*x10 + x95*(x108 - x109)) =E= 0;
e48.. x52*x35 - x27*x10 =E= 0;
e49.. x53*x36 - (x28*x11 + x96*(x111 - x110)) =E= 0;
e50.. x54*x36 - (x29*x11 + x96*(0.5*x111 - 0.5*x110)) =E= 0;
e51.. x55*x36 - (x30*x11 + x96*(x110 - x111)) =E= 0;
e52.. x56*x36 - x31*x11 =E= 0;
e53.. -628400000000*exp(-15500/x97)*x37**0.5*x38/(x37 + x38 + x39 + x40)**1.5
+ x102 =E= 0;
e54.. -628400000000*exp(-15500/x98)*x41**0.5*x42/(x41 + x42 + x43 + x44)**1.5
+ x104 =E= 0;
e55.. -628400000000*exp(-15500/x99)*x45**0.5*x46/(x45 + x46 + x47 + x48)**1.5
+ x106 =E= 0;
e56.. -628400000000*exp(-15500/x100)*x49**0.5*x50/(x49 + x50 + x51 + x52)**1.5
+ x108 =E= 0;
e57.. -628400000000*exp(-15500/x101)*x53**0.5*x54/(x53 + x54 + x55 + x56)**1.5
+ x110 =E= 0;
e58.. -2.732e16*exp(-26799.5/x97)*x38**0.5*x39/x37**0.5/(x37 + x38 + x39 + x40)
+ x103 =E= 0;
e59.. -2.732e16*exp(-26799.5/x98)*x42**0.5*x43/x41**0.5/(x41 + x42 + x43 + x44)
+ x105 =E= 0;
e60.. -2.732e16*exp(-26799.5/x99)*x46**0.5*x47/x45**0.5/(x45 + x46 + x47 + x48)
+ x107 =E= 0;
e61.. -2.732e16*exp(-26799.5/x100)*x50**0.5*x51/x49**0.5/(x49 + x50 + x51 + x52
) + x109 =E= 0;
e62.. -2.732e16*exp(-26799.5/x101)*x54**0.5*x55/x53**0.5/(x53 + x54 + x55 + x56
) + x111 =E= 0;
e63.. x32 - x57 - x58 - x59 - x60 - x61 - x82 =E= 0;
e64.. x33 - x62 - x63 - x64 - x65 - x66 - x83 =E= 0;
e65.. x34 - x67 - x68 - x69 - x70 - x71 - x84 =E= 0;
e66.. x35 - x72 - x73 - x74 - x75 - x76 - x85 =E= 0;
e67.. x36 - x77 - x78 - x79 - x80 - x81 - x86 =E= 0;
e68.. - x82 - x83 - x84 - x85 - x86 + x87 =E= 0;
e69.. x87*x88 - (x82*x37 + x83*x41 + x84*x45 + x85*x49 + x86*x53) =E= 0;
e70.. x87*x89 - (x82*x38 + x83*x42 + x84*x46 + x85*x50 + x86*x54) =E= 0;
e71.. x87*x90 - (x82*x39 + x83*x43 + x84*x47 + x85*x51 + x86*x55) =E= 0;
e72.. x87*x91 - (x82*x40 + x83*x44 + x84*x48 + x85*x52 + x86*x56) =E= 0;
* set non-default bounds
x2.up = 10000;
x3.up = 10000;
x4.up = 10000;
x5.up = 10000;
x6.up = 10000;
x7.up = 10000;
x8.up = 10000;
x9.up = 10000;
x10.up = 10000;
x11.up = 10000;
x12.up = 100;
x13.up = 100;
x14.up = 100;
x15.up = 100;
x16.up = 100;
x17.up = 100;
x18.up = 100;
x19.up = 100;
x20.up = 100;
x21.up = 100;
x22.up = 100;
x23.up = 100;
x24.up = 100;
x25.up = 100;
x26.up = 100;
x27.up = 100;
x28.up = 100;
x29.up = 100;
x30.up = 100;
x31.up = 100;
x32.up = 10000;
x33.up = 10000;
x34.up = 10000;
x35.up = 10000;
x36.up = 10000;
x37.up = 100;
x38.up = 100;
x39.up = 100;
x40.up = 100;
x41.up = 100;
x42.up = 100;
x43.up = 100;
x44.up = 100;
x45.up = 100;
x46.up = 100;
x47.up = 100;
x48.up = 100;
x49.up = 100;
x50.up = 100;
x51.up = 100;
x52.up = 100;
x53.up = 100;
x54.up = 100;
x55.up = 100;
x56.up = 100;
x57.up = 10000;
x58.up = 10000;
x59.up = 10000;
x60.up = 10000;
x61.up = 10000;
x62.up = 10000;
x63.up = 10000;
x64.up = 10000;
x65.up = 10000;
x66.up = 10000;
x67.up = 10000;
x68.up = 10000;
x69.up = 10000;
x70.up = 10000;
x71.up = 10000;
x72.up = 10000;
x73.up = 10000;
x74.up = 10000;
x75.up = 10000;
x76.up = 10000;
x77.up = 10000;
x78.up = 10000;
x79.up = 10000;
x80.up = 10000;
x81.up = 10000;
x82.up = 10000;
x83.up = 10000;
x84.up = 10000;
x85.up = 10000;
x86.up = 10000;
x87.up = 10000;
x88.up = 100;
x89.up = 100;
x90.up = 100;
x91.up = 100;
x92.up = 50000;
x93.up = 50000;
x94.up = 50000;
x95.up = 50000;
x96.up = 50000;
x97.lo = 300; x97.up = 1200;
x98.lo = 300; x98.up = 1200;
x99.lo = 300; x99.up = 1200;
x100.lo = 300; x100.up = 1200;
x101.lo = 300; x101.up = 1200;
x102.up = 100000;
x103.up = 100000;
x104.up = 100000;
x105.up = 100000;
x106.up = 100000;
x107.up = 100000;
x108.up = 100000;
x109.up = 100000;
x110.up = 100000;
x111.up = 100000;
* set non-default levels
x2.l = 7731;
x3.l = 7731;
x4.l = 7731;
x5.l = 7731;
x6.l = 7731;
x7.l = 7731;
x8.l = 7731;
x9.l = 7731;
x10.l = 7731;
x11.l = 7731;
x12.l = 1;
x13.l = 1;
x14.l = 1;
x15.l = 1;
x16.l = 1;
x17.l = 1;
x18.l = 1;
x19.l = 1;
x20.l = 1;
x21.l = 1;
x22.l = 1;
x23.l = 1;
x24.l = 1;
x25.l = 1;
x26.l = 1;
x27.l = 1;
x28.l = 1;
x29.l = 1;
x30.l = 1;
x31.l = 1;
x32.l = 7731;
x33.l = 7731;
x34.l = 7731;
x35.l = 7731;
x36.l = 7731;
x37.l = 1;
x38.l = 1;
x39.l = 1;
x40.l = 1;
x41.l = 1;
x42.l = 1;
x43.l = 1;
x44.l = 1;
x45.l = 1;
x46.l = 1;
x47.l = 1;
x48.l = 1;
x49.l = 1;
x50.l = 1;
x51.l = 1;
x52.l = 1;
x53.l = 1;
x54.l = 1;
x55.l = 1;
x56.l = 1;
x57.l = 7731;
x58.l = 7731;
x59.l = 7731;
x60.l = 7731;
x61.l = 7731;
x62.l = 7731;
x63.l = 7731;
x64.l = 7731;
x65.l = 7731;
x66.l = 7731;
x67.l = 7731;
x68.l = 7731;
x69.l = 7731;
x70.l = 7731;
x71.l = 7731;
x72.l = 7731;
x73.l = 7731;
x74.l = 7731;
x75.l = 7731;
x76.l = 7731;
x77.l = 7731;
x78.l = 7731;
x79.l = 7731;
x80.l = 7731;
x81.l = 7731;
x82.l = 7731;
x83.l = 7731;
x84.l = 7731;
x85.l = 7731;
x86.l = 7731;
x87.l = 7731;
x88.l = 1;
x89.l = 1;
x90.l = 1;
x91.l = 1;
x92.l = 1;
x93.l = 1;
x94.l = 1;
x95.l = 1;
x96.l = 1;
x97.l = 1200;
x98.l = 1200;
x99.l = 1200;
x100.l = 1200;
x101.l = 1200;
Model m / all /;
m.limrow=0; m.limcol=0;
m.tolproj=0.0;
$if NOT '%gams.u1%' == '' $include '%gams.u1%'
$if not set NLP $set NLP NLP
Solve m using %NLP% minimizing objvar;
Last updated: 2025-08-07 Git hash: e62cedfc