Running command: translateModel(Buildings.Fluid.Interfaces.Examples.HeaterCooler_u,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_5.0.1_Buildings.Fluid.Interfaces.Examples.HeaterCooler_u")
Notification: Performance of loadModel(Buildings): time 3.73/3.73, allocations: 402 MB / 416.6 MB, free: 10.14 MB / 346.7 MB
Notification: Performance of FrontEnd - loaded program: time 3.162e-05/3.181e-05, allocations: 4 kB / 0.501 GB, free: 8.254 MB / 410.7 MB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.2017/0.2018, allocations: 92.68 MB / 0.5915 GB, free: 11.39 MB / 0.4948 GB
Notification: Performance of NFInst.instantiate(Buildings.Fluid.Interfaces.Examples.HeaterCooler_u): time 0.993/1.195, allocations: 240.4 MB / 0.8262 GB, free: 13.89 MB / 0.698 GB
Notification: Performance of NFInst.instExpressions: time 0.1053/1.3, allocations: 38.28 MB / 0.8636 GB, free: 7.527 MB / 0.7292 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.01396/1.314, allocations: 330.3 kB / 0.8639 GB, free: 7.203 MB / 0.7292 GB
Notification: Performance of NFTyping.typeComponents: time 0.02008/1.334, allocations: 2.813 MB / 0.8666 GB, free: 4.375 MB / 0.7292 GB
Notification: Performance of NFTyping.typeBindings: time 0.05288/1.387, allocations: 7.983 MB / 0.8744 GB, free: 12.36 MB / 0.7448 GB
Notification: Performance of NFTyping.typeClassSections: time 0.02998/1.417, allocations: 4.639 MB / 0.879 GB, free: 7.715 MB / 0.7448 GB
Notification: Performance of NFFlatten.flatten: time 0.6842/2.102, allocations: 8.623 MB / 0.8874 GB, free: 65.51 MB / 0.7448 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.01036/2.112, allocations: 3.337 MB / 0.8906 GB, free: 65.41 MB / 0.7448 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.0189/2.131, allocations: 4.558 MB / 0.8951 GB, free: 65.39 MB / 0.7448 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.01104/2.142, allocations: 2.894 MB / 0.8979 GB, free: 65.38 MB / 0.7448 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.01648/2.159, allocations: 2.757 MB / 0.9006 GB, free: 65.37 MB / 0.7448 GB
Notification: Performance of NFPackage.collectConstants: time 0.003487/2.162, allocations: 213.9 kB / 0.9008 GB, free: 65.37 MB / 0.7448 GB
Notification: Performance of NFScalarize.scalarize: time 0.003224/2.165, allocations: 0.966 MB / 0.9018 GB, free: 65.37 MB / 0.7448 GB
Notification: Performance of NFVerifyModel.verify: time 0.005346/2.171, allocations: 0.6923 MB / 0.9024 GB, free: 65.37 MB / 0.7448 GB
Notification: Performance of NFConvertDAE.convert: time 0.01802/2.189, allocations: 7.304 MB / 0.9096 GB, free: 64.78 MB / 0.7448 GB
Notification: Performance of FrontEnd - DAE generated: time 4.758e-06/2.189, allocations: 0 / 0.9096 GB, free: 64.78 MB / 0.7448 GB
Notification: Performance of FrontEnd: time 2.665e-06/2.189, allocations: 0 / 0.9096 GB, free: 64.78 MB / 0.7448 GB
Notification: Performance of Transformations before backend: time 0.0004122/2.189, allocations: 4.969 kB / 0.9096 GB, free: 64.78 MB / 0.7448 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 1057
 * Number of variables: 1057
Notification: Performance of Generate backend data structure: time 0.01523/2.205, allocations: 5.182 MB / 0.9146 GB, free: 62.16 MB / 0.7448 GB
Notification: Performance of prepare preOptimizeDAE: time 5.298e-05/2.205, allocations: 9.5 kB / 0.9146 GB, free: 62.16 MB / 0.7448 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.004642/2.209, allocations: 0.7802 MB / 0.9154 GB, free: 61.79 MB / 0.7448 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.01701/2.226, allocations: 4.641 MB / 0.9199 GB, free: 60.95 MB / 0.7448 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0004189/2.227, allocations: 324.2 kB / 0.9203 GB, free: 60.94 MB / 0.7448 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 0.001602/2.228, allocations: 438.7 kB / 0.9207 GB, free: 60.94 MB / 0.7448 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.02154/2.25, allocations: 5.06 MB / 0.9256 GB, free: 59.95 MB / 0.7448 GB
Notification: Performance of preOpt findStateOrder (simulation): time 0.0002324/2.25, allocations: 17.62 kB / 0.9256 GB, free: 59.95 MB / 0.7448 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.001054/2.251, allocations: 180 kB / 0.9258 GB, free: 59.95 MB / 0.7448 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0001732/2.252, allocations: 125.6 kB / 0.9259 GB, free: 59.95 MB / 0.7448 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0181/2.27, allocations: 3.625 MB / 0.9295 GB, free: 59.89 MB / 0.7448 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 0.03838/2.308, allocations: 26.06 MB / 0.9549 GB, free: 42.43 MB / 0.7448 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.01337/2.322, allocations: 3.243 MB / 0.9581 GB, free: 41.92 MB / 0.7448 GB
Notification: Performance of preOpt evalFunc (simulation): time 0.003029/2.325, allocations: 3.586 MB / 0.9616 GB, free: 37.89 MB / 0.7448 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 7.703e-05/2.325, allocations: 62.94 kB / 0.9616 GB, free: 37.84 MB / 0.7448 GB
Notification: Performance of pre-optimization done (n=236): time 5.169e-06/2.325, allocations: 0 / 0.9616 GB, free: 37.84 MB / 0.7448 GB
Notification: Performance of matching and sorting (n=252): time 0.07716/2.402, allocations: 12.57 MB / 0.9739 GB, free: 33.98 MB / 0.7448 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 5.447e-05/2.402, allocations: 129.1 kB / 0.974 GB, free: 33.86 MB / 0.7448 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.009524/2.412, allocations: 3.683 MB / 0.9776 GB, free: 33.55 MB / 0.7448 GB
Notification: Performance of collectPreVariables (initialization): time 0.0007408/2.412, allocations: 83.89 kB / 0.9777 GB, free: 33.52 MB / 0.7448 GB
Notification: Performance of collectInitialEqns (initialization): time 0.002925/2.415, allocations: 2.755 MB / 0.9804 GB, free: 32.66 MB / 0.7448 GB
Notification: Performance of collectInitialBindings (initialization): time 0.001541/2.417, allocations: 0.8816 MB / 0.9813 GB, free: 32.09 MB / 0.7448 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 0.0003228/2.417, allocations: 60.25 kB / 0.9813 GB, free: 32.09 MB / 0.7448 GB
Notification: Performance of setup shared object (initialization): time 0.0002126/2.417, allocations: 421.1 kB / 0.9817 GB, free: 31.78 MB / 0.7448 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.004159/2.422, allocations: 1.069 MB / 0.9828 GB, free: 31.77 MB / 0.7448 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.005207/2.427, allocations: 2.096 MB / 0.9848 GB, free: 30.57 MB / 0.7448 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.004883/2.432, allocations: 1.37 MB / 0.9862 GB, free: 30.48 MB / 0.7448 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.628e-05/2.432, allocations: 6.125 kB / 0.9862 GB, free: 30.48 MB / 0.7448 GB
Notification: Performance of matching and sorting (n=394) (initialization): time 0.03344/2.465, allocations: 4.912 MB / 0.991 GB, free: 29.82 MB / 0.7448 GB
Notification: Performance of prepare postOptimizeDAE: time 0.00212/2.468, allocations: 10.55 MB / 1.001 GB, free: 18.74 MB / 0.7448 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.181e-05/2.468, allocations: 22.5 kB / 1.001 GB, free: 18.74 MB / 0.7448 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.003724/2.471, allocations: 0.6884 MB / 1.002 GB, free: 18.55 MB / 0.7448 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.005448/2.477, allocations: 0.7439 MB / 1.003 GB, free: 18.44 MB / 0.7448 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.007251/2.484, allocations: 5.28 MB / 1.008 GB, free: 13.62 MB / 0.7448 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.009728/2.494, allocations: 0.5609 MB / 1.008 GB, free: 13.12 MB / 0.7448 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0008608/2.495, allocations: 147.6 kB / 1.009 GB, free: 13 MB / 0.7448 GB
Notification: Performance of prepare postOptimizeDAE: time 1.576e-05/2.495, allocations: 4 kB / 1.009 GB, free: 12.99 MB / 0.7448 GB
Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.009443/2.504, allocations: 3.012 MB / 1.011 GB, free: 11.04 MB / 0.7448 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.943e-05/2.504, allocations: 27.95 kB / 1.011 GB, free: 11.01 MB / 0.7448 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.001419/2.506, allocations: 318.2 kB / 1.012 GB, free: 10.73 MB / 0.7448 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.005242/2.511, allocations: 0.7275 MB / 1.013 GB, free: 10.07 MB / 0.7448 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01433/2.526, allocations: 10.81 MB / 1.023 GB, free: 15.34 MB / 0.7605 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.01162/2.537, allocations: 483.9 kB / 1.024 GB, free: 14.91 MB / 0.7605 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0009573/2.538, allocations: 149.2 kB / 1.024 GB, free: 14.79 MB / 0.7605 GB
Warning: Assuming fixed start value for the following 2 variables:
         mix2.dynBal.U:VARIABLE(start = 1e-06 * mix2.dynBal.rho_start * Buildings.Fluid.Interfaces.Examples.HeaterCooler_u.mix2.dynBal.Medium.specificInternalEnergy(Buildings.Fluid.Interfaces.Examples.HeaterCooler_u.mix2.dynBal.Medium.setState_pTX(mix2.dynBal.p_start, mix2.dynBal.T_start, {})) unit = "J" fixed = true nominal = 100000.0 protected = true )  "Internal energy of fluid" type: Real
         mix1.dynBal.U:VARIABLE(start = 1e-06 * mix1.dynBal.rho_start * Buildings.Fluid.Interfaces.Examples.HeaterCooler_u.mix1.dynBal.Medium.specificInternalEnergy(Buildings.Fluid.Interfaces.Examples.HeaterCooler_u.mix1.dynBal.Medium.setState_pTX(mix1.dynBal.p_start, mix1.dynBal.T_start, {})) unit = "J" fixed = true nominal = 100000.0 protected = true )  "Internal energy of fluid" type: Real
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 99
 * Number of states: 0 ()
 * Number of discrete variables: 0 ()
 * Number of discrete states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for initialization (364):
 * Single equations (assignments): 356
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 2
 * Torn equation systems: 6
 * Mixed (continuous/discrete) equation systems: 0
Notification: Equation system details:
 * Constant Jacobian: 0
 * Linear Jacobian (size,density): 0
 * Non-linear Jacobian: 2 {1,1}
 * Without analytic Jacobian: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems: 0
 * Non-linear torn systems: 6 {1 3,1 3,1 3,1 3,1 9,1 9}
Notification: Performance of prepare postOptimizeDAE: time 0.005474/2.544, allocations: 0.976 MB / 1.025 GB, free: 14.29 MB / 0.7605 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.002647/2.546, allocations: 0.5048 MB / 1.025 GB, free: 13.78 MB / 0.7605 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.05026/2.597, allocations: 5.809 MB / 1.031 GB, free: 9.328 MB / 0.7605 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.03385/2.631, allocations: 4.56 MB / 1.035 GB, free: 5.812 MB / 0.7605 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.815e-05/2.631, allocations: 0 / 1.035 GB, free: 5.812 MB / 0.7605 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.004869/2.636, allocations: 1.007 MB / 1.036 GB, free: 5.047 MB / 0.7605 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.001513/2.637, allocations: 53.5 kB / 1.036 GB, free: 5.035 MB / 0.7605 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.006887/2.644, allocations: 444.6 kB / 1.037 GB, free: 4.637 MB / 0.7605 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0007716/2.645, allocations: 218.3 kB / 1.037 GB, free: 4.441 MB / 0.7605 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 0.02475/2.67, allocations: 3.759 MB / 1.041 GB, free: 1.406 MB / 0.7605 GB
Error: post-optimization module createDAEmodeBDAE (simulation) failed.