Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IBPSA_latest_IBPSA.Fluid.Chillers.Examples.Carnot_y.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/IBPSA 4.0.0-master/package.mo", uses=false) Using package IBPSA with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IBPSA 4.0.0-master/package.mo) Using package Modelica with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo) Using package Complex with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo) Using package ModelicaServices with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo) Running command: "" <> buildModelFMU(IBPSA.Fluid.Chillers.Examples.Carnot_y,fileNamePrefix="IBPSA_latest_IBPSA_Fluid_Chillers_Examples_Carnot_y",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(IBPSA.Fluid.Chillers.Examples.Carnot_y,fileNamePrefix="IBPSA_latest_IBPSA_Fluid_Chillers_Examples_Carnot_y",fmuType="me",version="2.0",platforms={"static"}) Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001498/0.001498, allocations: 99.8 kB / 16.4 MB, free: 6.461 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.00119/0.00119, allocations: 196 kB / 17.34 MB, free: 5.715 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.307/1.307, allocations: 222.9 MB / 241 MB, free: 15.13 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IBPSA 4.0.0-master/package.mo): time 0.7685/0.7685, allocations: 122.8 MB / 414.1 MB, free: 15.74 MB / 334.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001182/0.001182, allocations: 69.83 kB / 0.5679 GB, free: 29.01 MB / 446.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1202/0.1214, allocations: 77.93 MB / 0.644 GB, free: 9.52 MB / 494.1 MB Notification: Performance of NFInst.instantiate(IBPSA.Fluid.Chillers.Examples.Carnot_y): time 0.07682/0.1982, allocations: 75.13 MB / 0.7174 GB, free: 14.13 MB / 0.5606 GB Notification: Performance of NFInst.instExpressions: time 0.01862/0.2169, allocations: 12.75 MB / 0.7299 GB, free: 1.352 MB / 0.5606 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002302/0.2192, allocations: 67.62 kB / 0.7299 GB, free: 1.285 MB / 0.5606 GB Notification: Performance of NFTyping.typeComponents: time 0.002383/0.2216, allocations: 0.8696 MB / 0.7308 GB, free: 420 kB / 0.5606 GB Notification: Performance of NFTyping.typeBindings: time 0.007023/0.2287, allocations: 2.584 MB / 0.7333 GB, free: 13.82 MB / 0.5762 GB Notification: Performance of NFTyping.typeClassSections: time 0.003548/0.2322, allocations: 1.399 MB / 0.7347 GB, free: 12.43 MB / 0.5762 GB Notification: Performance of NFFlatten.flatten: time 0.005616/0.2379, allocations: 4.393 MB / 0.739 GB, free: 8.02 MB / 0.5762 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002169/0.2401, allocations: 1.441 MB / 0.7404 GB, free: 6.543 MB / 0.5762 GB Notification: Performance of NFEvalConstants.evaluate: time 0.003804/0.2439, allocations: 1.664 MB / 0.742 GB, free: 4.879 MB / 0.5762 GB Notification: Performance of NFSimplifyModel.simplify: time 0.002128/0.246, allocations: 1.194 MB / 0.7432 GB, free: 3.68 MB / 0.5762 GB Notification: Performance of NFPackage.collectConstants: time 0.0004879/0.2465, allocations: 164 kB / 0.7433 GB, free: 3.52 MB / 0.5762 GB Notification: Performance of NFFlatten.collectFunctions: time 0.003402/0.2499, allocations: 1.404 MB / 0.7447 GB, free: 2.113 MB / 0.5762 GB Notification: Performance of NFScalarize.scalarize: time 0.0005815/0.2505, allocations: 406.6 kB / 0.7451 GB, free: 1.715 MB / 0.5762 GB Notification: Performance of NFVerifyModel.verify: time 0.001447/0.252, allocations: 0.8982 MB / 0.7459 GB, free: 0.8125 MB / 0.5762 GB Notification: Performance of NFConvertDAE.convert: time 0.3435/0.5955, allocations: 2.863 MB / 0.7487 GB, free: 36.57 MB / 0.5762 GB Notification: Performance of FrontEnd - DAE generated: time 7.254e-06/0.5955, allocations: 0.75 kB / 0.7487 GB, free: 36.57 MB / 0.5762 GB Notification: Performance of FrontEnd: time 1.372e-06/0.5955, allocations: 3.031 kB / 0.7487 GB, free: 36.57 MB / 0.5762 GB Notification: Performance of Transformations before backend: time 3.064e-05/0.5956, allocations: 0.9688 kB / 0.7487 GB, free: 36.57 MB / 0.5762 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 240 * Number of variables: 240 Notification: Performance of Generate backend data structure: time 0.004183/0.5997, allocations: 2.134 MB / 0.7508 GB, free: 35.48 MB / 0.5762 GB Notification: Performance of prepare preOptimizeDAE: time 4.431e-05/0.5998, allocations: 9.75 kB / 0.7508 GB, free: 35.48 MB / 0.5762 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0001934/0.6, allocations: 149.6 kB / 0.751 GB, free: 35.45 MB / 0.5762 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0008769/0.6009, allocations: 234.2 kB / 0.7512 GB, free: 35.36 MB / 0.5762 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002496/0.6034, allocations: 1.538 MB / 0.7527 GB, free: 34.94 MB / 0.5762 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 6.476e-05/0.6035, allocations: 81.09 kB / 0.7528 GB, free: 34.94 MB / 0.5762 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.000167/0.6036, allocations: 100.1 kB / 0.7529 GB, free: 34.94 MB / 0.5762 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002173/0.6058, allocations: 1.099 MB / 0.754 GB, free: 34.8 MB / 0.5762 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.857e-05/0.6059, allocations: 5.469 kB / 0.754 GB, free: 34.8 MB / 0.5762 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 9.291e-05/0.606, allocations: 39.5 kB / 0.754 GB, free: 34.8 MB / 0.5762 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.683e-05/0.606, allocations: 30.58 kB / 0.754 GB, free: 34.8 MB / 0.5762 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001966/0.608, allocations: 0.8816 MB / 0.7549 GB, free: 34.8 MB / 0.5762 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 0.006044/0.614, allocations: 4.91 MB / 0.7597 GB, free: 32.61 MB / 0.5762 GB Notification: Performance of preOpt comSubExp (simulation): time 0.00134/0.6154, allocations: 0.6207 MB / 0.7603 GB, free: 32.58 MB / 0.5762 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0006728/0.6161, allocations: 343.2 kB / 0.7606 GB, free: 32.57 MB / 0.5762 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0004262/0.6165, allocations: 0.8309 MB / 0.7614 GB, free: 31.63 MB / 0.5762 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.161e-05/0.6165, allocations: 47.91 kB / 0.7615 GB, free: 31.59 MB / 0.5762 GB Notification: Performance of pre-optimization done (n=61): time 2.074e-06/0.6165, allocations: 1.094 kB / 0.7615 GB, free: 31.59 MB / 0.5762 GB Notification: Performance of matching and sorting (n=61): time 0.007212/0.6238, allocations: 1.681 MB / 0.7631 GB, free: 31.32 MB / 0.5762 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.062e-05/0.6238, allocations: 61.88 kB / 0.7632 GB, free: 31.26 MB / 0.5762 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002089/0.6259, allocations: 1.227 MB / 0.7644 GB, free: 31.1 MB / 0.5762 GB Notification: Performance of collectPreVariables (initialization): time 0.0001041/0.626, allocations: 39.78 kB / 0.7644 GB, free: 31.07 MB / 0.5762 GB Notification: Performance of collectInitialEqns (initialization): time 0.000469/0.6265, allocations: 0.6065 MB / 0.765 GB, free: 30.86 MB / 0.5762 GB Notification: Performance of collectInitialBindings (initialization): time 0.000183/0.6267, allocations: 229.9 kB / 0.7652 GB, free: 30.71 MB / 0.5762 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002169/0.6269, allocations: 155.4 kB / 0.7654 GB, free: 30.68 MB / 0.5762 GB Notification: Performance of setup shared object (initialization): time 5.828e-05/0.627, allocations: 333.2 kB / 0.7657 GB, free: 30.38 MB / 0.5762 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0006477/0.6276, allocations: 290.5 kB / 0.766 GB, free: 30.37 MB / 0.5762 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0008241/0.6285, allocations: 496.9 kB / 0.7664 GB, free: 30.16 MB / 0.5762 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001657/0.6301, allocations: 0.7108 MB / 0.7671 GB, free: 30.01 MB / 0.5762 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 5.29e-06/0.6302, allocations: 2.156 kB / 0.7671 GB, free: 30.01 MB / 0.5762 GB Notification: Performance of matching and sorting (n=88) (initialization): time 0.004622/0.6348, allocations: 1.284 MB / 0.7684 GB, free: 29.87 MB / 0.5762 GB Notification: Performance of prepare postOptimizeDAE: time 1.852e-05/0.6348, allocations: 7.031 kB / 0.7684 GB, free: 29.87 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.648e-06/0.6348, allocations: 6.844 kB / 0.7684 GB, free: 29.87 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0005578/0.6354, allocations: 137.8 kB / 0.7685 GB, free: 29.86 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005968/0.636, allocations: 156.5 kB / 0.7687 GB, free: 29.86 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0006858/0.6367, allocations: 0.6941 MB / 0.7694 GB, free: 29.33 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001096/0.6378, allocations: 122.6 kB / 0.7695 GB, free: 29.28 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.722e-05/0.6379, allocations: 37.77 kB / 0.7695 GB, free: 29.28 MB / 0.5762 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.001011/0.6389, allocations: 0.5524 MB / 0.7701 GB, free: 29.2 MB / 0.5762 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0007373/0.6396, allocations: 491.8 kB / 0.7705 GB, free: 28.99 MB / 0.5762 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.00129/0.6409, allocations: 0.7004 MB / 0.7712 GB, free: 28.85 MB / 0.5762 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.384e-06/0.641, allocations: 1.125 kB / 0.7712 GB, free: 28.85 MB / 0.5762 GB Notification: Performance of matching and sorting (n=88) (initialization_lambda0): time 0.004597/0.6456, allocations: 1.272 MB / 0.7725 GB, free: 28.71 MB / 0.5762 GB Notification: Performance of prepare postOptimizeDAE: time 1.262e-05/0.6456, allocations: 10.41 kB / 0.7725 GB, free: 28.71 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.282e-06/0.6456, allocations: 4.25 kB / 0.7725 GB, free: 28.71 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0004987/0.6461, allocations: 133.9 kB / 0.7726 GB, free: 28.7 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005889/0.6467, allocations: 156.7 kB / 0.7727 GB, free: 28.7 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0006612/0.6474, allocations: 0.6993 MB / 0.7734 GB, free: 28.17 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001182/0.6486, allocations: 109.2 kB / 0.7735 GB, free: 28.14 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.71e-05/0.6486, allocations: 34.78 kB / 0.7736 GB, free: 28.14 MB / 0.5762 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 16 * 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 (79): * Single equations (assignments): 78 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(1,9)} Notification: Performance of prepare postOptimizeDAE: time 0.000237/0.6489, allocations: 223.4 kB / 0.7738 GB, free: 27.96 MB / 0.5762 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002476/0.6491, allocations: 140.3 kB / 0.7739 GB, free: 27.88 MB / 0.5762 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.004576/0.6537, allocations: 1.262 MB / 0.7751 GB, free: 27.77 MB / 0.5762 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.523e-05/0.6538, allocations: 16.41 kB / 0.7752 GB, free: 27.76 MB / 0.5762 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.979e-06/0.6538, allocations: 0 / 0.7752 GB, free: 27.76 MB / 0.5762 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.003968/0.6577, allocations: 1.104 MB / 0.7762 GB, free: 27.56 MB / 0.5762 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.006543/0.6643, allocations: 2.619 MB / 0.7788 GB, free: 27.05 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 7.444e-06/0.6643, allocations: 3.688 kB / 0.7788 GB, free: 27.05 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0004846/0.6648, allocations: 115.3 kB / 0.7789 GB, free: 27.05 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0004697/0.6653, allocations: 127.2 kB / 0.779 GB, free: 27.04 MB / 0.5762 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.478e-05/0.6653, allocations: 20.69 kB / 0.779 GB, free: 27.04 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.004451/0.6698, allocations: 2.584 MB / 0.7816 GB, free: 25.44 MB / 0.5762 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.638e-06/0.6698, allocations: 3.719 kB / 0.7816 GB, free: 25.44 MB / 0.5762 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.004951/0.6748, allocations: 1.712 MB / 0.7832 GB, free: 25.04 MB / 0.5762 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0005969/0.6754, allocations: 310.9 kB / 0.7835 GB, free: 24.87 MB / 0.5762 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002138/0.6756, allocations: 19.61 kB / 0.7836 GB, free: 24.87 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0008289/0.6764, allocations: 51.94 kB / 0.7836 GB, free: 24.87 MB / 0.5762 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001102/0.6766, allocations: 61.44 kB / 0.7837 GB, free: 24.86 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 5.693e-05/0.6766, allocations: 36.06 kB / 0.7837 GB, free: 24.86 MB / 0.5762 GB Notification: Performance of sorting global known variables: time 0.001052/0.6777, allocations: 0.8772 MB / 0.7846 GB, free: 24.75 MB / 0.5762 GB Notification: Performance of sort global known variables: time 1.5e-07/0.6777, allocations: 0 / 0.7846 GB, free: 24.75 MB / 0.5762 GB Notification: Performance of remove unused functions: time 0.001835/0.6795, allocations: 0.7262 MB / 0.7853 GB, free: 24.65 MB / 0.5762 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 15 * Number of states: 2 (chi.con.vol.dynBal.U,chi.eva.vol.dynBal.U) * 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 (56): * Single equations (assignments): 51 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 4 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(1,9)} Notification: Performance of Backend phase and start with SimCode phase: time 0.005808/0.6854, allocations: 2.606 MB / 0.7878 GB, free: 23.67 MB / 0.5762 GB Notification: Performance of simCode: created initialization part: time 0.002392/0.6878, allocations: 1.121 MB / 0.7889 GB, free: 23.65 MB / 0.5762 GB Notification: Performance of simCode: created event and clocks part: time 3.757e-06/0.6878, allocations: 0 / 0.7889 GB, free: 23.65 MB / 0.5762 GB Notification: Performance of simCode: created simulation system equations: time 0.001361/0.6891, allocations: 0.5527 MB / 0.7894 GB, free: 23.54 MB / 0.5762 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003283/0.6924, allocations: 0.8 MB / 0.7902 GB, free: 23.41 MB / 0.5762 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0168/0.7092, allocations: 9.844 MB / 0.7998 GB, free: 18.63 MB / 0.5762 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0004809/0.7098, allocations: 1.17 MB / 0.801 GB, free: 17.72 MB / 0.5762 GB Notification: Performance of simCode: alias equations: time 0.001078/0.7108, allocations: 303.5 kB / 0.8013 GB, free: 17.58 MB / 0.5762 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0005486/0.7114, allocations: 0.5122 MB / 0.8018 GB, free: 17.15 MB / 0.5762 GB Notification: Performance of SimCode: time 8.92e-07/0.7114, allocations: 0 / 0.8018 GB, free: 17.15 MB / 0.5762 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.06964/0.781, allocations: 42.4 MB / 0.8432 GB, free: 7.691 MB / 0.6075 GB Notification: Performance of buildModelFMU: Generate platform static: time 13.55/14.34, allocations: 14.25 kB / 0.8432 GB, free: 7.68 MB / 0.6075 GB (rm -f IBPSA_latest_IBPSA.Fluid.Chillers.Examples.Carnot_y.pipe ; mkfifo IBPSA_latest_IBPSA.Fluid.Chillers.Examples.Carnot_y.pipe ; head -c 1048576 < IBPSA_latest_IBPSA.Fluid.Chillers.Examples.Carnot_y.pipe >> ../files/IBPSA_latest_IBPSA.Fluid.Chillers.Examples.Carnot_y.sim & python3 -m fmpy simulate --output-file IBPSA_latest_IBPSA.Fluid.Chillers.Examples.Carnot_y_res.csv --start-time 0 --stop-time 3600 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 1.44 IBPSA_latest_IBPSA_Fluid_Chillers_Examples_Carnot_y.fmu > IBPSA_latest_IBPSA.Fluid.Chillers.Examples.Carnot_y.pipe 2>&1)