Running command: translateModel(Buildings.Fluid.HeatExchangers.Ground.Boreholes.Examples.UTube,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_5.0.1_Buildings.Fluid.HeatExchangers.Ground.Boreholes.Examples.UTube")
Notification: Performance of loadModel(Buildings): time 3.906/3.906, allocations: 402 MB / 416.6 MB, free: 10.12 MB / 346.7 MB
Notification: Performance of FrontEnd - loaded program: time 3.454e-05/3.471e-05, allocations: 4 kB / 0.501 GB, free: 8.23 MB / 410.7 MB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.2034/0.2035, allocations: 92.69 MB / 0.5915 GB, free: 11.37 MB / 0.4948 GB
Notification: Performance of NFInst.instantiate(Buildings.Fluid.HeatExchangers.Ground.Boreholes.Examples.UTube): time 0.5745/0.7781, allocations: 42.53 MB / 0.633 GB, free: 4.82 MB / 0.5105 GB
Notification: Performance of NFInst.instExpressions: time 0.02677/0.8049, allocations: 11.07 MB / 0.6438 GB, free: 13.2 MB / 0.5261 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.003588/0.8085, allocations: 85.12 kB / 0.6439 GB, free: 13.17 MB / 0.5261 GB
Notification: Performance of NFTyping.typeComponents: time 0.004189/0.8128, allocations: 0.7545 MB / 0.6446 GB, free: 12.72 MB / 0.5261 GB
Notification: Performance of NFTyping.typeBindings: time 0.01053/0.8234, allocations: 2.033 MB / 0.6466 GB, free: 11.29 MB / 0.5261 GB
Notification: Performance of NFTyping.typeClassSections: time 0.006367/0.8298, allocations: 1.199 MB / 0.6478 GB, free: 10.73 MB / 0.5261 GB
Notification: Performance of NFFlatten.flatten: time 0.06372/0.8935, allocations: 21.24 MB / 0.6685 GB, free: 11.4 MB / 0.5417 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.03117/0.9247, allocations: 10.75 MB / 0.679 GB, free: 4.93 MB / 0.5417 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.03314/0.9579, allocations: 9.333 MB / 0.6881 GB, free: 11.57 MB / 0.5573 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.03239/0.9904, allocations: 9.153 MB / 0.6971 GB, free: 2.395 MB / 0.5573 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.01804/1.008, allocations: 1.893 MB / 0.6989 GB, free: 0.5 MB / 0.5573 GB
Notification: Performance of NFPackage.collectConstants: time 0.007522/1.016, allocations: 0.7383 MB / 0.6996 GB, free: 15.76 MB / 0.573 GB
Notification: Performance of NFScalarize.scalarize: time 0.01114/1.027, allocations: 4.033 MB / 0.7036 GB, free: 11.71 MB / 0.573 GB
Notification: Performance of NFVerifyModel.verify: time 0.01255/1.04, allocations: 1.934 MB / 0.7055 GB, free: 9.781 MB / 0.573 GB
Notification: Performance of NFConvertDAE.convert: time 0.06663/1.107, allocations: 39.51 MB / 0.7441 GB, free: 2.176 MB / 0.6042 GB
Notification: Performance of FrontEnd - DAE generated: time 5.09e-06/1.107, allocations: 0 / 0.7441 GB, free: 2.176 MB / 0.6042 GB
Notification: Performance of FrontEnd: time 3.937e-06/1.107, allocations: 4 kB / 0.7441 GB, free: 2.172 MB / 0.6042 GB
Notification: Performance of Transformations before backend: time 0.001152/1.108, allocations: 0 / 0.7441 GB, free: 2.172 MB / 0.6042 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 2773
 * Number of variables: 2773
Notification: Performance of Generate backend data structure: time 0.09599/1.204, allocations: 18.93 MB / 0.7625 GB, free: 15.05 MB / 0.6355 GB
Notification: Performance of prepare preOptimizeDAE: time 5.802e-05/1.204, allocations: 8.031 kB / 0.7626 GB, free: 15.05 MB / 0.6355 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.01438/1.218, allocations: 2.028 MB / 0.7645 GB, free: 13 MB / 0.6355 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.08429/1.303, allocations: 22.23 MB / 0.7862 GB, free: 6.664 MB / 0.6511 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.002387/1.305, allocations: 1.536 MB / 0.7877 GB, free: 5 MB / 0.6511 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 0.00844/1.314, allocations: 1.374 MB / 0.7891 GB, free: 3.625 MB / 0.6511 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.07071/1.384, allocations: 18.02 MB / 0.8067 GB, free: 1.176 MB / 0.6667 GB
Notification: Performance of preOpt findStateOrder (simulation): time 0.0009052/1.385, allocations: 43.61 kB / 0.8067 GB, free: 1.133 MB / 0.6667 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.004848/1.39, allocations: 452 kB / 0.8071 GB, free: 0.6914 MB / 0.6667 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0004714/1.391, allocations: 315.9 kB / 0.8075 GB, free: 392 kB / 0.6667 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.06081/1.452, allocations: 16.24 MB / 0.8233 GB, free: 116 kB / 0.6823 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 1.372/2.824, allocations: 96.8 MB / 0.9178 GB, free: 172.2 MB / 0.7449 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.04537/2.869, allocations: 14.85 MB / 0.9323 GB, free: 168.1 MB / 0.7449 GB
Notification: Performance of preOpt evalFunc (simulation): time 0.001759/2.871, allocations: 0.5055 MB / 0.9328 GB, free: 167.7 MB / 0.7449 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.02553/2.896, allocations: 7.824 MB / 0.9405 GB, free: 164.8 MB / 0.7449 GB
Notification: Performance of pre-optimization done (n=868): time 1.922e-05/2.896, allocations: 0 / 0.9405 GB, free: 164.8 MB / 0.7449 GB
Notification: Performance of matching and sorting (n=890): time 0.1868/3.083, allocations: 50.5 MB / 0.9898 GB, free: 131.8 MB / 0.7449 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 0.0004233/3.084, allocations: 1.112 MB / 0.9909 GB, free: 130.5 MB / 0.7449 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.03637/3.12, allocations: 13.78 MB / 1.004 GB, free: 116.9 MB / 0.7449 GB
Notification: Performance of collectPreVariables (initialization): time 0.004852/3.125, allocations: 337.7 kB / 1.005 GB, free: 116.5 MB / 0.7449 GB
Notification: Performance of collectInitialEqns (initialization): time 0.01301/3.138, allocations: 6.687 MB / 1.011 GB, free: 109.8 MB / 0.7449 GB
Notification: Performance of collectInitialBindings (initialization): time 0.007419/3.145, allocations: 3.204 MB / 1.014 GB, free: 106.7 MB / 0.7449 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 0.004678/3.15, allocations: 284 kB / 1.015 GB, free: 106.4 MB / 0.7449 GB
Notification: Performance of setup shared object (initialization): time 0.001901/3.152, allocations: 0.9171 MB / 1.015 GB, free: 105.5 MB / 0.7449 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.04016/3.192, allocations: 10.79 MB / 1.026 GB, free: 94.66 MB / 0.7449 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.04644/3.239, allocations: 13.66 MB / 1.039 GB, free: 80.06 MB / 0.7449 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.03834/3.277, allocations: 12.98 MB / 1.052 GB, free: 66.93 MB / 0.7449 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 8.35e-05/3.277, allocations: 17.31 kB / 1.052 GB, free: 66.92 MB / 0.7449 GB
Notification: Performance of matching and sorting (n=1847) (initialization): time 0.09314/3.371, allocations: 28.55 MB / 1.08 GB, free: 38.1 MB / 0.7449 GB
Notification: Performance of prepare postOptimizeDAE: time 0.005689/3.376, allocations: 29.78 MB / 1.109 GB, free: 7 MB / 0.7449 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.0003361/3.377, allocations: 63.98 kB / 1.109 GB, free: 6.938 MB / 0.7449 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.006332/3.383, allocations: 1.82 MB / 1.111 GB, free: 5.027 MB / 0.7449 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.06629/3.449, allocations: 5.416 MB / 1.116 GB, free: 15.61 MB / 0.7605 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.08834/3.538, allocations: 64.84 MB / 1.179 GB, free: 10.37 MB / 0.823 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.06364/3.601, allocations: 4.378 MB / 1.184 GB, free: 5.98 MB / 0.823 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.005862/3.607, allocations: 0.6716 MB / 1.184 GB, free: 5.309 MB / 0.823 GB
Notification: Performance of prepare postOptimizeDAE: time 2.008e-05/3.607, allocations: 4 kB / 1.184 GB, free: 5.305 MB / 0.823 GB
Error: Internal error IndexReduction.pantelidesIndexReduction failed! System is structurally singular and cannot be handled because the number of unassigned equations is larger than the number of states. Use -d=bltdump to get more information.
Notification: Performance of <failed> postOpt replaceHomotopyWithSimplified (initialization): time 1.226/4.834, allocations: 12.51 MB / 1.197 GB, free: 246.6 MB / 0.8232 GB
Error: post-optimization module replaceHomotopyWithSimplified (initialization) failed.
Error: No system for the symbolic initialization was generated