Running: ./testmodel.py --libraries=/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelica/./OMCompiler/build/lib/omlibrary/ --ompython_omhome=/usr Buildings_6.0.0_Buildings.Fluid.Storage.Validation.HeatExchangerLocation.conf.json
Using package Buildings with version 6.0.0 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/build/lib/omlibrary/Buildings 6.0.0/package.mo)
Using package Modelica with version 3.2.2 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/build/lib/omlibrary/Modelica 3.2.2/package.mo)
Using package Complex with version 3.2.2 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/build/lib/omlibrary/Complex 3.2.2.mo)
Using package ModelicaServices with version 3.2.2 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/build/lib/omlibrary/ModelicaServices 3.2.2/package.mo)
Running command: translateModel(Buildings.Fluid.Storage.Validation.HeatExchangerLocation,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_6.0.0_Buildings.Fluid.Storage.Validation.HeatExchangerLocation")
Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/build/lib/omlibrary/ModelicaServices 3.2.2/package.mo): time 0.01536/0.01536, allocations: 107 kB / 15.06 MB, free: 5.562 MB / 13.93 MB
Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/build/lib/omlibrary/Complex 3.2.2.mo): time 0.001872/0.001872, allocations: 186.1 kB / 15.95 MB, free: 5.523 MB / 13.93 MB
Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/build/lib/omlibrary/Modelica 3.2.2/package.mo): time 2.046/2.046, allocations: 194.6 MB / 211.3 MB, free: 11.29 MB / 170.7 MB
Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/build/lib/omlibrary/Buildings 6.0.0/package.mo): time 2.317/2.317, allocations: 236.2 MB / 492.6 MB, free: 11.33 MB / 394.7 MB
Notification: Performance of FrontEnd - loaded program: time 0.0004714/0.0004717, allocations: 12 kB / 0.5869 GB, free: 2.195 MB / 490.7 MB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.5834/0.5839, allocations: 98.72 MB / 0.6833 GB, free: 16.88 MB / 0.5261 GB
Notification: Performance of NFInst.instantiate(Buildings.Fluid.Storage.Validation.HeatExchangerLocation): time 0.1586/0.7425, allocations: 90.63 MB / 0.7718 GB, free: 3.59 MB / 0.5886 GB
Notification: Performance of NFInst.instExpressions: time 0.05536/0.7979, allocations: 26.98 MB / 0.7982 GB, free: 8.559 MB / 0.6198 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.005625/0.8036, allocations: 119.2 kB / 0.7983 GB, free: 8.441 MB / 0.6198 GB
Notification: Performance of NFTyping.typeComponents: time 0.006519/0.8102, allocations: 1.59 MB / 0.7999 GB, free: 6.844 MB / 0.6198 GB
Notification: Performance of NFTyping.typeBindings: time 0.01583/0.826, allocations: 4.02 MB / 0.8038 GB, free: 2.812 MB / 0.6198 GB
Notification: Performance of NFTyping.typeClassSections: time 0.01202/0.8381, allocations: 2.915 MB / 0.8066 GB, free: 15.89 MB / 0.6355 GB
Notification: Performance of NFFlatten.flatten: time 0.04461/0.8827, allocations: 29.5 MB / 0.8354 GB, free: 2.348 MB / 0.6511 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.03673/0.9195, allocations: 18.74 MB / 0.8537 GB, free: 15.51 MB / 0.6823 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.02481/0.9444, allocations: 11.57 MB / 0.865 GB, free: 3.898 MB / 0.6823 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.01982/0.9642, allocations: 10.2 MB / 0.875 GB, free: 9.66 MB / 0.698 GB
Notification: Performance of NFPackage.collectConstants: time 0.004748/0.969, allocations: 0.8906 MB / 0.8759 GB, free: 8.77 MB / 0.698 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.0128/0.9818, allocations: 2.353 MB / 0.8782 GB, free: 6.414 MB / 0.698 GB
Notification: Performance of NFScalarize.scalarize: time 0.007442/0.9893, allocations: 3.713 MB / 0.8818 GB, free: 2.688 MB / 0.698 GB
Notification: Performance of NFVerifyModel.verify: time 0.009174/0.9985, allocations: 4.281 MB / 0.886 GB, free: 14.39 MB / 0.7136 GB
Notification: Performance of NFConvertDAE.convert: time 1.211/2.209, allocations: 30.8 MB / 0.9161 GB, free: 48.52 MB / 0.7293 GB
Notification: Performance of FrontEnd - DAE generated: time 3.769e-06/2.209, allocations: 2.734 kB / 0.9161 GB, free: 48.52 MB / 0.7293 GB
Notification: Performance of FrontEnd: time 2.865e-06/2.209, allocations: 0 / 0.9161 GB, free: 48.52 MB / 0.7293 GB
Notification: Performance of Transformations before backend: time 0.0007902/2.21, allocations: 0.9062 kB / 0.9161 GB, free: 48.52 MB / 0.7293 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 4015
 * Number of variables: 4015
Notification: Performance of Generate backend data structure: time 0.05152/2.262, allocations: 18.4 MB / 0.934 GB, free: 41.75 MB / 0.7293 GB
Notification: Performance of prepare preOptimizeDAE: time 4.181e-05/2.262, allocations: 10.09 kB / 0.934 GB, free: 41.75 MB / 0.7293 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.01179/2.274, allocations: 2.255 MB / 0.9362 GB, free: 40.7 MB / 0.7293 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.04644/2.32, allocations: 17.02 MB / 0.9529 GB, free: 38.88 MB / 0.7293 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.001335/2.321, allocations: 1.184 MB / 0.954 GB, free: 38.84 MB / 0.7293 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 0.004811/2.326, allocations: 1.582 MB / 0.9556 GB, free: 38.83 MB / 0.7293 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.0596/2.386, allocations: 23.55 MB / 0.9786 GB, free: 36.63 MB / 0.7293 GB
Notification: Performance of preOpt findStateOrder (simulation): time 0.0007597/2.387, allocations: 57.25 kB / 0.9786 GB, free: 36.62 MB / 0.7293 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.003806/2.39, allocations: 0.6421 MB / 0.9792 GB, free: 36.62 MB / 0.7293 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0004677/2.391, allocations: 471.5 kB / 0.9797 GB, free: 36.61 MB / 0.7293 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.05341/2.444, allocations: 21.09 MB / 1 GB, free: 33.17 MB / 0.7293 GB
Warning: The model contains alias variables with redundant start and/or conflicting nominal values. It is recommended to resolve the conflicts, because otherwise the system could be hard to solve. To print the conflicting alias sets and the chosen candidates please use -d=aliasConflicts.
Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.184/2.628, allocations: 99.71 MB / 1.098 GB, free: 10.62 MB / 0.7918 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.03697/2.665, allocations: 15.04 MB / 1.112 GB, free: 11.82 MB / 0.8074 GB
Notification: Performance of preOpt evalFunc (simulation): time 0.07873/2.744, allocations: 28.33 MB / 1.14 GB, free: 14.76 MB / 0.8387 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0001858/2.744, allocations: 150.3 kB / 1.14 GB, free: 14.6 MB / 0.8387 GB
Notification: Performance of preOpt simplifyInStream (simulation): time 0.009399/2.754, allocations: 0.9709 MB / 1.141 GB, free: 13.62 MB / 0.8387 GB
Notification: Performance of pre-optimization done (n=910): time 3.168e-05/2.754, allocations: 0 / 1.141 GB, free: 13.62 MB / 0.8387 GB
Notification: Performance of matching and sorting (n=910): time 0.05689/2.811, allocations: 19.69 MB / 1.16 GB, free: 9.867 MB / 0.8543 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001432/2.811, allocations: 142.5 kB / 1.16 GB, free: 9.715 MB / 0.8543 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.03618/2.847, allocations: 14.83 MB / 1.175 GB, free: 10.93 MB / 0.8699 GB
Notification: Performance of collectPreVariables (initialization): time 0.002043/2.849, allocations: 209.7 kB / 1.175 GB, free: 10.72 MB / 0.8699 GB
Notification: Performance of collectInitialEqns (initialization): time 0.01163/2.861, allocations: 8.085 MB / 1.183 GB, free: 2.617 MB / 0.8699 GB
Notification: Performance of collectInitialBindings (initialization): time 0.005615/2.867, allocations: 3.169 MB / 1.186 GB, free: 15.47 MB / 0.8855 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 0.002293/2.869, allocations: 260 kB / 1.186 GB, free: 15.21 MB / 0.8855 GB
Notification: Performance of setup shared object (initialization): time 0.001478/2.87, allocations: 0.8514 MB / 1.187 GB, free: 14.36 MB / 0.8855 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.01823/2.889, allocations: 6.821 MB / 1.194 GB, free: 7.531 MB / 0.8855 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.02218/2.911, allocations: 10.82 MB / 1.204 GB, free: 11.02 MB / 0.9012 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.02212/2.933, allocations: 9.018 MB / 1.213 GB, free: 2.074 MB / 0.9012 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 0.0001348/2.933, allocations: 36 kB / 1.213 GB, free: 2.039 MB / 0.9012 GB
Notification: Performance of matching and sorting (n=1681) (initialization): time 0.05595/2.989, allocations: 20 MB / 1.233 GB, free: 14.71 MB / 0.9324 GB
Notification: Performance of prepare postOptimizeDAE: time 0.5326/3.522, allocations: 74.05 MB / 1.305 GB, free: 330.7 MB / 0.948 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.0003965/3.522, allocations: 124.9 kB / 1.305 GB, free: 330.7 MB / 0.948 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.002977/3.525, allocations: 0.8172 MB / 1.306 GB, free: 330.7 MB / 0.948 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.01826/3.544, allocations: 3.135 MB / 1.309 GB, free: 330.7 MB / 0.948 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01225/3.556, allocations: 7.975 MB / 1.317 GB, free: 326 MB / 0.948 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.01911/3.575, allocations: 1.167 MB / 1.318 GB, free: 325.8 MB / 0.948 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.005126/3.58, allocations: 0.5953 MB / 1.319 GB, free: 325.7 MB / 0.948 GB
Notification: Performance of prepare postOptimizeDAE: time 2.133e-05/3.58, allocations: 4.844 kB / 1.319 GB, free: 325.7 MB / 0.948 GB
Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.065/3.645, allocations: 18.82 MB / 1.337 GB, free: 318.4 MB / 0.948 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.0005557/3.646, allocations: 123.6 kB / 1.337 GB, free: 318.4 MB / 0.948 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.002338/3.648, allocations: 0.7996 MB / 1.338 GB, free: 318.3 MB / 0.948 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.01701/3.665, allocations: 3.138 MB / 1.341 GB, free: 318 MB / 0.948 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01772/3.683, allocations: 9.105 MB / 1.35 GB, free: 311.7 MB / 0.948 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0297/3.713, allocations: 1.129 MB / 1.351 GB, free: 311.5 MB / 0.948 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.004518/3.717, allocations: 0.5965 MB / 1.352 GB, free: 311.4 MB / 0.948 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 561
 * Number of states: 0 ()
 * Number of discrete variables: 0 ()
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for initialization (1629):
 * Single equations (assignments): 1626
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 0
 * Torn equation systems: 3
 * Mixed (continuous/discrete) equation systems: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems: 2 {(1,100.0%) 24,(1,100.0%) 24}
 * Non-linear torn systems: 1 {1 4}
Notification: Performance of prepare postOptimizeDAE: time 0.02566/3.743, allocations: 6.904 MB / 1.358 GB, free: 308.5 MB / 0.948 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.007792/3.751, allocations: 1.338 MB / 1.36 GB, free: 308.5 MB / 0.948 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.06199/3.813, allocations: 14.86 MB / 1.374 GB, free: 298.8 MB / 0.948 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 0.0001311/3.813, allocations: 88 kB / 1.374 GB, free: 298.7 MB / 0.948 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 5.586e-05/3.813, allocations: 4 kB / 1.374 GB, free: 298.7 MB / 0.948 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.04702/3.86, allocations: 12.38 MB / 1.386 GB, free: 286.4 MB / 0.948 GB
Warning: The model contains alias variables with redundant start and/or conflicting nominal values. It is recommended to resolve the conflicts, because otherwise the system could be hard to solve. To print the conflicting alias sets and the chosen candidates please use -d=aliasConflicts.
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0854/3.946, allocations: 32.95 MB / 1.418 GB, free: 253.6 MB / 0.948 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 7.134e-05/3.946, allocations: 8.031 kB / 1.418 GB, free: 253.6 MB / 0.948 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.01109/3.957, allocations: 1.748 MB / 1.42 GB, free: 251.8 MB / 0.948 GB
Notification: Performance of postOpt tearingSystem (simulation): time 0.001886/3.959, allocations: 0.6138 MB / 1.421 GB, free: 251.2 MB / 0.948 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.001864/3.961, allocations: 243.9 kB / 1.421 GB, free: 251 MB / 0.948 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.009848/3.971, allocations: 7.732 MB / 1.429 GB, free: 243.1 MB / 0.948 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.946e-06/3.971, allocations: 0 / 1.429 GB, free: 243.1 MB / 0.948 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.04498/4.016, allocations: 22.76 MB / 1.451 GB, free: 220.5 MB / 0.948 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.01107/4.027, allocations: 3.472 MB / 1.454 GB, free: 217 MB / 0.948 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.005246/4.032, allocations: 195.2 kB / 1.454 GB, free: 216.9 MB / 0.948 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.01404/4.046, allocations: 1.005 MB / 1.455 GB, free: 215.9 MB / 0.948 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.002002/4.048, allocations: 0.5219 MB / 1.456 GB, free: 215.4 MB / 0.948 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.001394/4.05, allocations: 319.8 kB / 1.456 GB, free: 215.1 MB / 0.948 GB
Notification: Performance of sorting global known variables: time 0.02229/4.072, allocations: 10.83 MB / 1.467 GB, free: 204.3 MB / 0.948 GB
Notification: Performance of sort global known variables: time 1.339e-06/4.072, allocations: 0 / 1.467 GB, free: 204.3 MB / 0.948 GB
Notification: Performance of remove unused functions: time 0.0426/4.115, allocations: 9.309 MB / 1.476 GB, free: 195.4 MB / 0.948 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 5
 * Number of states: 48 (tan_aTop.vol[1].dynBal.U,tan_aTop.vol[2].dynBal.U,tan_aTop.vol[3].dynBal.U,tan_aTop.vol[4].dynBal.U,tan_aTop.vol[5].dynBal.U,tan_aTop.vol[6].dynBal.U,tan_aTop.vol[7].dynBal.U,tan_aTop.vol[8].dynBal.U,tan_aTop.vol[9].dynBal.U,tan_aTop.vol[10].dynBal.U,tan_aTop.vol[11].dynBal.U,tan_aTop.vol[12].dynBal.U,tan_aTop.indTanHex.vol[1].dynBal.U,tan_aTop.indTanHex.vol[2].dynBal.U,tan_aTop.indTanHex.vol[3].dynBal.U,tan_aTop.indTanHex.vol[4].dynBal.U,tan_aTop.indTanHex.vol[5].dynBal.U,tan_aTop.indTanHex.vol[6].dynBal.U,tan_aTop.indTanHex.cap[1].T,tan_aTop.indTanHex.cap[2].T,tan_aTop.indTanHex.cap[3].T,tan_aTop.indTanHex.cap[4].T,tan_aTop.indTanHex.cap[5].T,tan_aTop.indTanHex.cap[6].T,tan_bTop.vol[1].dynBal.U,tan_bTop.vol[2].dynBal.U,tan_bTop.vol[3].dynBal.U,tan_bTop.vol[4].dynBal.U,tan_bTop.vol[5].dynBal.U,tan_bTop.vol[6].dynBal.U,tan_bTop.vol[7].dynBal.U,tan_bTop.vol[8].dynBal.U,tan_bTop.vol[9].dynBal.U,tan_bTop.vol[10].dynBal.U,tan_bTop.vol[11].dynBal.U,tan_bTop.vol[12].dynBal.U,tan_bTop.indTanHex.vol[1].dynBal.U,tan_bTop.indTanHex.vol[2].dynBal.U,tan_bTop.indTanHex.vol[3].dynBal.U,tan_bTop.indTanHex.vol[4].dynBal.U,tan_bTop.indTanHex.vol[5].dynBal.U,tan_bTop.indTanHex.vol[6].dynBal.U,tan_bTop.indTanHex.cap[1].T,tan_bTop.indTanHex.cap[2].T,tan_bTop.indTanHex.cap[3].T,tan_bTop.indTanHex.cap[4].T,tan_bTop.indTanHex.cap[5].T,tan_bTop.indTanHex.cap[6].T)
 * Number of discrete variables: 0 ()
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for simulation (879):
 * Single equations (assignments): 867
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 9
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 0
 * Torn equation systems: 3
 * Mixed (continuous/discrete) equation systems: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems: 2 {(1,100.0%) 24,(1,100.0%) 24}
 * Non-linear torn systems: 1 {1 4}
Notification: Performance of Backend phase and start with SimCode phase: time 0.003254/4.118, allocations: 1.017 MB / 1.477 GB, free: 194.4 MB / 0.948 GB
Notification: Performance of simCode: created initialization part: time 0.05133/4.169, allocations: 25.76 MB / 1.502 GB, free: 168.7 MB / 0.948 GB
Notification: Performance of simCode: created event and clocks part: time 1.365e-05/4.169, allocations: 4.656 kB / 1.502 GB, free: 168.6 MB / 0.948 GB
Notification: Performance of simCode: created simulation system equations: time 0.01399/4.183, allocations: 6.849 MB / 1.509 GB, free: 161.8 MB / 0.948 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.04245/4.226, allocations: 8.497 MB / 1.517 GB, free: 153.4 MB / 0.948 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.08644/4.312, allocations: 45.55 MB / 1.561 GB, free: 107.8 MB / 0.948 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.02194/4.334, allocations: 11.81 MB / 1.573 GB, free: 95.95 MB / 0.948 GB
Notification: Performance of simCode: alias equations: time 0.04079/4.375, allocations: 8.986 MB / 1.582 GB, free: 86.94 MB / 0.948 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.006577/4.382, allocations: 1.175 MB / 1.583 GB, free: 85.77 MB / 0.948 GB
Notification: Performance of SimCode: time 1.878e-06/4.382, allocations: 4 kB / 1.583 GB, free: 85.76 MB / 0.948 GB
Notification: Performance of Templates: time 1.302/5.684, allocations: 295.6 MB / 1.872 GB, free: 186.6 MB / 0.948 GB