Running command: translateModel(Buildings.Experimental.DistrictHeatingCooling.Validation.IdealSmallSystem,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_5.0.1_Buildings.Experimental.DistrictHeatingCooling.Validation.IdealSmallSystem")
Notification: Performance of loadModel(Buildings): time 3.725/3.725, allocations: 402 MB / 416.6 MB, free: 10.12 MB / 346.7 MB
Notification: Performance of FrontEnd - loaded program: time 3.015e-05/3.017e-05, allocations: 4 kB / 0.5009 GB, free: 8.25 MB / 410.7 MB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.1968/0.1969, allocations: 92.68 MB / 0.5914 GB, free: 11.39 MB / 0.4948 GB
Notification: Performance of NFInst.instantiate(Buildings.Experimental.DistrictHeatingCooling.Validation.IdealSmallSystem): time 1.747/1.944, allocations: 365.1 MB / 0.948 GB, free: 59.32 MB / 0.7448 GB
Notification: Performance of NFInst.instExpressions: time 0.1382/2.082, allocations: 70.72 MB / 1.017 GB, free: 56.21 MB / 0.7448 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.01997/2.102, allocations: 0.5591 MB / 1.018 GB, free: 56.21 MB / 0.7448 GB
Notification: Performance of NFTyping.typeComponents: time 0.02316/2.126, allocations: 5.331 MB / 1.023 GB, free: 53.34 MB / 0.7448 GB
Notification: Performance of NFTyping.typeBindings: time 0.05926/2.185, allocations: 14.12 MB / 1.037 GB, free: 45.59 MB / 0.7448 GB
Notification: Performance of NFTyping.typeClassSections: time 0.03541/2.22, allocations: 8.244 MB / 1.045 GB, free: 40.45 MB / 0.7448 GB
Notification: Performance of NFFlatten.flatten: time 0.04367/2.264, allocations: 15.88 MB / 1.06 GB, free: 31.97 MB / 0.7448 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.01726/2.281, allocations: 6.678 MB / 1.067 GB, free: 26.59 MB / 0.7448 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.0238/2.305, allocations: 7.857 MB / 1.074 GB, free: 19.36 MB / 0.7448 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.01517/2.321, allocations: 5.391 MB / 1.08 GB, free: 14.13 MB / 0.7448 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.02258/2.343, allocations: 3.787 MB / 1.083 GB, free: 10.48 MB / 0.7448 GB
Notification: Performance of NFPackage.collectConstants: time 0.005768/2.349, allocations: 387.9 kB / 1.084 GB, free: 10.1 MB / 0.7448 GB
Notification: Performance of NFScalarize.scalarize: time 0.005349/2.354, allocations: 2.091 MB / 1.086 GB, free: 8.066 MB / 0.7448 GB
Notification: Performance of NFVerifyModel.verify: time 0.008048/2.363, allocations: 1.207 MB / 1.087 GB, free: 6.859 MB / 0.7448 GB
Notification: Performance of NFConvertDAE.convert: time 0.03219/2.395, allocations: 16.02 MB / 1.103 GB, free: 7.32 MB / 0.7605 GB
Notification: Performance of FrontEnd - DAE generated: time 4.959e-06/2.395, allocations: 0 / 1.103 GB, free: 7.32 MB / 0.7605 GB
Notification: Performance of FrontEnd: time 3.086e-06/2.395, allocations: 0 / 1.103 GB, free: 7.32 MB / 0.7605 GB
Notification: Performance of Transformations before backend: time 0.0007761/2.396, allocations: 0 / 1.103 GB, free: 7.32 MB / 0.7605 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 1820
 * Number of variables: 1820
Notification: Performance of Generate backend data structure: time 0.02854/2.424, allocations: 9.533 MB / 1.112 GB, free: 13.62 MB / 0.7761 GB
Notification: Performance of prepare preOptimizeDAE: time 5.65e-05/2.424, allocations: 8.031 kB / 1.112 GB, free: 13.61 MB / 0.7761 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.02132/2.446, allocations: 2.693 MB / 1.114 GB, free: 10.9 MB / 0.7761 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.04058/2.486, allocations: 11.04 MB / 1.125 GB, free: 15.76 MB / 0.7917 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.003334/2.49, allocations: 0.8235 MB / 1.126 GB, free: 14.94 MB / 0.7917 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 0.002982/2.493, allocations: 0.7421 MB / 1.127 GB, free: 14.2 MB / 0.7917 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.04101/2.534, allocations: 9.458 MB / 1.136 GB, free: 4.312 MB / 0.7917 GB
Notification: Performance of preOpt findStateOrder (simulation): time 0.0003595/2.534, allocations: 23.81 kB / 1.136 GB, free: 4.289 MB / 0.7917 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.002356/2.536, allocations: 302.9 kB / 1.136 GB, free: 3.996 MB / 0.7917 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0003005/2.537, allocations: 204 kB / 1.137 GB, free: 3.797 MB / 0.7917 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.03735/2.574, allocations: 7.541 MB / 1.144 GB, free: 12.24 MB / 0.8073 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 0.102/2.676, allocations: 49.61 MB / 1.192 GB, free: 7.016 MB / 0.8542 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.02453/2.701, allocations: 5.099 MB / 1.197 GB, free: 1.934 MB / 0.8542 GB
Notification: Performance of preOpt evalFunc (simulation): time 0.03157/2.732, allocations: 10.06 MB / 1.207 GB, free: 7.266 MB / 0.8698 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.01776/2.75, allocations: 3.14 MB / 1.21 GB, free: 4.086 MB / 0.8698 GB
Notification: Performance of preOpt simplifyInStream (simulation): time 0.006876/2.757, allocations: 0.5546 MB / 1.211 GB, free: 3.527 MB / 0.8698 GB
Notification: Performance of pre-optimization done (n=357): time 1.616e-05/2.757, allocations: 0 / 1.211 GB, free: 3.527 MB / 0.8698 GB
Notification: Performance of matching and sorting (n=371): time 1.129/3.886, allocations: 18.08 MB / 1.228 GB, free: 345.9 MB / 0.8699 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 9.651e-05/3.886, allocations: 141.1 kB / 1.229 GB, free: 345.8 MB / 0.8699 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.02487/3.911, allocations: 8.182 MB / 1.237 GB, free: 342.9 MB / 0.8699 GB
Notification: Performance of collectPreVariables (initialization): time 0.001291/3.912, allocations: 116.4 kB / 1.237 GB, free: 342.8 MB / 0.8699 GB
Notification: Performance of collectInitialEqns (initialization): time 0.007487/3.92, allocations: 5.479 MB / 1.242 GB, free: 338.9 MB / 0.8699 GB
Notification: Performance of collectInitialBindings (initialization): time 0.002441/3.922, allocations: 1.28 MB / 1.243 GB, free: 337.9 MB / 0.8699 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 0.0005628/3.923, allocations: 103.2 kB / 1.243 GB, free: 337.8 MB / 0.8699 GB
Notification: Performance of setup shared object (initialization): time 0.0003752/3.923, allocations: 0.5013 MB / 1.244 GB, free: 337.4 MB / 0.8699 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.01048/3.934, allocations: 2.364 MB / 1.246 GB, free: 336.6 MB / 0.8699 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.01241/3.946, allocations: 4.332 MB / 1.25 GB, free: 333.4 MB / 0.8699 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.01183/3.958, allocations: 3.059 MB / 1.253 GB, free: 332.1 MB / 0.8699 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 6.484e-05/3.958, allocations: 16.19 kB / 1.253 GB, free: 332.1 MB / 0.8699 GB
Notification: Performance of matching and sorting (n=666) (initialization): time 0.03552/3.994, allocations: 8.005 MB / 1.261 GB, free: 329.1 MB / 0.8699 GB
Notification: Performance of prepare postOptimizeDAE: time 0.006036/4, allocations: 29.41 MB / 1.29 GB, free: 297.5 MB / 0.8699 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.0001982/4, allocations: 51.12 kB / 1.29 GB, free: 297.5 MB / 0.8699 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.001835/4.002, allocations: 440.1 kB / 1.29 GB, free: 297.4 MB / 0.8699 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.01703/4.019, allocations: 1.763 MB / 1.292 GB, free: 297.3 MB / 0.8699 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01198/4.031, allocations: 10.34 MB / 1.302 GB, free: 288.1 MB / 0.8699 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.01644/4.048, allocations: 0.9431 MB / 1.303 GB, free: 287.9 MB / 0.8699 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.001435/4.049, allocations: 294.2 kB / 1.303 GB, free: 287.9 MB / 0.8699 GB
Notification: Performance of prepare postOptimizeDAE: time 1.342e-05/4.049, allocations: 3.969 kB / 1.303 GB, free: 287.9 MB / 0.8699 GB
Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.02125/4.07, allocations: 6.514 MB / 1.31 GB, free: 285.4 MB / 0.8699 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.0001346/4.071, allocations: 51.25 kB / 1.31 GB, free: 285.4 MB / 0.8699 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.001211/4.072, allocations: 353.4 kB / 1.31 GB, free: 285.3 MB / 0.8699 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.01065/4.082, allocations: 1.367 MB / 1.311 GB, free: 285.2 MB / 0.8699 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.00872/4.091, allocations: 8.917 MB / 1.32 GB, free: 277.3 MB / 0.8699 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.01489/4.106, allocations: 0.8691 MB / 1.321 GB, free: 277.2 MB / 0.8699 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.001297/4.107, allocations: 268.5 kB / 1.321 GB, free: 277.1 MB / 0.8699 GB
Warning: Assuming fixed start value for the following 5 variables:
         spl5.vol.dynBal.m:VARIABLE(min = max(0.0, 0.0) start = spl5.vol.V * spl5.vol.rho_start unit = "kg" fixed = true stateSelect=StateSelect.prefer protected = true )  "Mass of fluid" type: Real
         spl4.vol.dynBal.m:VARIABLE(min = max(0.0, 0.0) start = spl4.vol.V * spl4.vol.rho_start unit = "kg" fixed = true stateSelect=StateSelect.prefer protected = true )  "Mass of fluid" type: Real
         spl3.vol.dynBal.m:VARIABLE(min = max(0.0, 0.0) start = spl3.vol.V * spl3.vol.rho_start unit = "kg" fixed = true stateSelect=StateSelect.prefer protected = true )  "Mass of fluid" type: Real
         spl2.vol.dynBal.m:VARIABLE(min = max(0.0, 0.0) start = spl2.vol.V * spl2.vol.rho_start unit = "kg" fixed = true stateSelect=StateSelect.prefer protected = true )  "Mass of fluid" type: Real
         spl1.vol.dynBal.m:VARIABLE(min = max(0.0, 0.0) start = spl1.vol.V * spl1.vol.rho_start unit = "kg" fixed = true stateSelect=StateSelect.prefer protected = true )  "Mass of fluid" type: Real
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 224
 * Number of states: 0 ()
 * Number of discrete variables: 20 ($whenCondition4,$PRE.QCoo2.nextTimeEvent,$whenCondition3,$PRE.QCoo1.nextTimeEvent,$whenCondition2,$PRE.QHea2.nextTimeEvent,$whenCondition1,$PRE.QHea1.nextTimeEvent,QHea1.nextTimeEvent,$PRE.QHea1.nextTimeEventScaled,QHea1.nextTimeEventScaled,QHea2.nextTimeEvent,$PRE.QHea2.nextTimeEventScaled,QHea2.nextTimeEventScaled,QCoo1.nextTimeEvent,$PRE.QCoo1.nextTimeEventScaled,QCoo1.nextTimeEventScaled,QCoo2.nextTimeEvent,$PRE.QCoo2.nextTimeEventScaled,QCoo2.nextTimeEventScaled)
 * Number of discrete states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for initialization (625):
 * Single equations (assignments): 605
 * Array equations: 4
 * Algorithm blocks: 4
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 9
 * Torn equation systems: 3
 * Mixed (continuous/discrete) equation systems: 0
Notification: Equation system details:
 * Constant Jacobian: 0
 * Linear Jacobian (size,density): 0
 * Non-linear Jacobian: 9 {1,1,1,1,1,1,1,1,1}
 * Without analytic Jacobian: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems: 2 {(1,100.0%) 6,(1,100.0%) 6}
 * Non-linear torn systems: 1 {1 9}
Notification: Performance of prepare postOptimizeDAE: time 0.007961/4.115, allocations: 2.533 MB / 1.324 GB, free: 275.8 MB / 0.8699 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.003187/4.119, allocations: 0.9628 MB / 1.325 GB, free: 275.2 MB / 0.8699 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.03049/4.149, allocations: 7.35 MB / 1.332 GB, free: 272 MB / 0.8699 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.02431/4.174, allocations: 5.638 MB / 1.337 GB, free: 267.1 MB / 0.8699 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.362e-05/4.174, allocations: 3.984 kB / 1.337 GB, free: 267.1 MB / 0.8699 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.007385/4.181, allocations: 1.849 MB / 1.339 GB, free: 265.2 MB / 0.8699 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.003529/4.185, allocations: 80 kB / 1.339 GB, free: 265.1 MB / 0.8699 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.01502/4.2, allocations: 0.8617 MB / 1.34 GB, free: 264.3 MB / 0.8699 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.00116/4.201, allocations: 270.9 kB / 1.34 GB, free: 264 MB / 0.8699 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.
Error: Internal error Transformation Module PFPlusExt index Reduction Method Pantelides failed!
Notification: Performance of <failed> postOpt createDAEmodeBDAE (simulation): time 0.02879/4.23, allocations: 4.925 MB / 1.345 GB, free: 259.1 MB / 0.8699 GB
Error: post-optimization module createDAEmodeBDAE (simulation) failed.