Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_10_Buildings.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow.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/Buildings 10.1.1-maint.10.0.x/package.mo", uses=false) Using package Buildings with version 10.1.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 10.1.1-maint.10.0.x/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(Buildings.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow,fileNamePrefix="Buildings_10_Buildings_Fluid_HeatPumps_Validation_Carnot_TCon_reverseFlow",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow,fileNamePrefix="Buildings_10_Buildings_Fluid_HeatPumps_Validation_Carnot_TCon_reverseFlow",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 0.001075/0.001075, allocations: 108 kB / 15.6 MB, free: 132 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.00115/0.00115, allocations: 198.3 kB / 16.54 MB, free: 6.672 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.271/1.271, allocations: 222.9 MB / 240.2 MB, free: 4.41 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 10.1.1-maint.10.0.x/package.mo): time 2.391/2.391, allocations: 437.1 MB / 0.7104 GB, free: 5.121 MB / 0.5606 GB Notification: Performance of FrontEnd - loaded program: time 0.001271/0.001271, allocations: 63.91 kB / 0.8693 GB, free: 4.59 MB / 0.7169 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.5455/0.5468, allocations: 151.6 MB / 1.017 GB, free: 2.535 MB / 0.7637 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow): time 0.05938/0.6062, allocations: 61.24 MB / 1.077 GB, free: 5.078 MB / 0.8262 GB Notification: Performance of NFInst.instExpressions: time 0.01497/0.6212, allocations: 11.99 MB / 1.089 GB, free: 9.059 MB / 0.8419 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001895/0.6232, allocations: 59.62 kB / 1.089 GB, free: 9 MB / 0.8419 GB Notification: Performance of NFTyping.typeComponents: time 0.001952/0.6252, allocations: 0.6752 MB / 1.09 GB, free: 8.32 MB / 0.8419 GB Notification: Performance of NFTyping.typeBindings: time 0.005017/0.6302, allocations: 1.971 MB / 1.092 GB, free: 6.34 MB / 0.8419 GB Notification: Performance of NFTyping.typeClassSections: time 0.002833/0.6331, allocations: 1.204 MB / 1.093 GB, free: 5.145 MB / 0.8419 GB Notification: Performance of NFFlatten.flatten: time 0.003615/0.6367, allocations: 3.073 MB / 1.096 GB, free: 2.062 MB / 0.8419 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001677/0.6384, allocations: 1.131 MB / 1.097 GB, free: 0.8945 MB / 0.8419 GB Notification: Performance of NFEvalConstants.evaluate: time 0.002793/0.6412, allocations: 1.322 MB / 1.098 GB, free: 15.57 MB / 0.8575 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001501/0.6427, allocations: 0.91 MB / 1.099 GB, free: 14.66 MB / 0.8575 GB Notification: Performance of NFPackage.collectConstants: time 0.0003292/0.643, allocations: 120 kB / 1.099 GB, free: 14.54 MB / 0.8575 GB Notification: Performance of NFFlatten.collectFunctions: time 0.002671/0.6457, allocations: 1.439 MB / 1.101 GB, free: 13.1 MB / 0.8575 GB Notification: Performance of NFScalarize.scalarize: time 0.0004033/0.6461, allocations: 302.8 kB / 1.101 GB, free: 12.8 MB / 0.8575 GB Notification: Performance of NFVerifyModel.verify: time 0.001079/0.6472, allocations: 0.6958 MB / 1.102 GB, free: 12.1 MB / 0.8575 GB Notification: Performance of NFConvertDAE.convert: time 0.003234/0.6505, allocations: 2.29 MB / 1.104 GB, free: 9.805 MB / 0.8575 GB Notification: Performance of FrontEnd - DAE generated: time 4.017e-06/0.6505, allocations: 4 kB / 1.104 GB, free: 9.801 MB / 0.8575 GB Notification: Performance of FrontEnd: time 1.312e-06/0.6505, allocations: 0 / 1.104 GB, free: 9.801 MB / 0.8575 GB Notification: Performance of Transformations before backend: time 6.118e-05/0.6506, allocations: 0 / 1.104 GB, free: 9.801 MB / 0.8575 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 194 * Number of variables: 194 Notification: Performance of Generate backend data structure: time 0.003497/0.6541, allocations: 1.734 MB / 1.105 GB, free: 8.008 MB / 0.8575 GB Notification: Performance of prepare preOptimizeDAE: time 3.874e-05/0.6541, allocations: 11.97 kB / 1.105 GB, free: 7.996 MB / 0.8575 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0001796/0.6543, allocations: 126.9 kB / 1.106 GB, free: 7.863 MB / 0.8575 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.002524/0.6568, allocations: 454.8 kB / 1.106 GB, free: 7.418 MB / 0.8575 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002077/0.6589, allocations: 1.113 MB / 1.107 GB, free: 6.246 MB / 0.8575 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0003444/0.6593, allocations: 121.9 kB / 1.107 GB, free: 6.129 MB / 0.8575 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001408/0.6594, allocations: 80 kB / 1.107 GB, free: 6.051 MB / 0.8575 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002101/0.6615, allocations: 1.01 MB / 1.108 GB, free: 5.008 MB / 0.8575 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.839e-05/0.6616, allocations: 0 / 1.108 GB, free: 5.008 MB / 0.8575 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 7.789e-05/0.6616, allocations: 36 kB / 1.108 GB, free: 4.973 MB / 0.8575 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.906e-05/0.6617, allocations: 20 kB / 1.108 GB, free: 4.953 MB / 0.8575 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002557/0.6642, allocations: 0.9446 MB / 1.109 GB, free: 4.012 MB / 0.8575 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 0.005808/0.67, allocations: 4.739 MB / 1.114 GB, free: 14.92 MB / 0.8731 GB Notification: Performance of preOpt comSubExp (simulation): time 0.004025/0.6741, allocations: 1.004 MB / 1.115 GB, free: 13.91 MB / 0.8731 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.00105/0.6751, allocations: 409.9 kB / 1.115 GB, free: 13.5 MB / 0.8731 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0009172/0.6761, allocations: 1.025 MB / 1.116 GB, free: 12.26 MB / 0.8731 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.501e-05/0.6761, allocations: 35 kB / 1.116 GB, free: 12.21 MB / 0.8731 GB Notification: Performance of pre-optimization done (n=53): time 1.552e-06/0.6761, allocations: 0 / 1.116 GB, free: 12.21 MB / 0.8731 GB Notification: Performance of matching and sorting (n=53): time 0.009296/0.6854, allocations: 2.228 MB / 1.118 GB, free: 9.953 MB / 0.8731 GB Notification: Performance of inlineWhenForInitialization (initialization): time 2.883e-05/0.6855, allocations: 59.83 kB / 1.119 GB, free: 9.883 MB / 0.8731 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001064/0.6865, allocations: 0.9354 MB / 1.119 GB, free: 8.93 MB / 0.8731 GB Notification: Performance of collectPreVariables (initialization): time 5.865e-05/0.6866, allocations: 41.7 kB / 1.119 GB, free: 8.883 MB / 0.8731 GB Notification: Performance of collectInitialEqns (initialization): time 0.000343/0.6869, allocations: 0.5079 MB / 1.12 GB, free: 8.371 MB / 0.8731 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001386/0.6871, allocations: 185.3 kB / 1.12 GB, free: 8.188 MB / 0.8731 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001981/0.6873, allocations: 130.1 kB / 1.12 GB, free: 8.055 MB / 0.8731 GB Notification: Performance of setup shared object (initialization): time 9.361e-05/0.6874, allocations: 326 kB / 1.121 GB, free: 7.73 MB / 0.8731 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.00103/0.6884, allocations: 358.8 kB / 1.121 GB, free: 7.375 MB / 0.8731 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001134/0.6896, allocations: 0.5194 MB / 1.121 GB, free: 6.789 MB / 0.8731 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.002021/0.6916, allocations: 0.758 MB / 1.122 GB, free: 6 MB / 0.8731 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.087e-06/0.6916, allocations: 0 / 1.122 GB, free: 6 MB / 0.8731 GB Notification: Performance of matching and sorting (n=69) (initialization): time 0.002853/0.6945, allocations: 1.076 MB / 1.123 GB, free: 4.91 MB / 0.8731 GB Notification: Performance of prepare postOptimizeDAE: time 1.982e-05/0.6945, allocations: 9.562 kB / 1.123 GB, free: 4.902 MB / 0.8731 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.342e-06/0.6945, allocations: 0 / 1.123 GB, free: 4.902 MB / 0.8731 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.001251/0.6958, allocations: 328.7 kB / 1.124 GB, free: 4.578 MB / 0.8731 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0006127/0.6964, allocations: 123.8 kB / 1.124 GB, free: 4.457 MB / 0.8731 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001435/0.6978, allocations: 0.9206 MB / 1.125 GB, free: 3.512 MB / 0.8731 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0009513/0.6988, allocations: 132.2 kB / 1.125 GB, free: 3.383 MB / 0.8731 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.254e-05/0.6989, allocations: 27.98 kB / 1.125 GB, free: 3.355 MB / 0.8731 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.001279/0.7002, allocations: 0.5596 MB / 1.125 GB, free: 2.793 MB / 0.8731 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.001121/0.7013, allocations: 0.5155 MB / 1.126 GB, free: 2.215 MB / 0.8731 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001976/0.7033, allocations: 0.7541 MB / 1.127 GB, free: 1.43 MB / 0.8731 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.565e-06/0.7033, allocations: 0 / 1.127 GB, free: 1.43 MB / 0.8731 GB Notification: Performance of matching and sorting (n=69) (initialization_lambda0): time 0.002886/0.7062, allocations: 1.064 MB / 1.128 GB, free: 360 kB / 0.8731 GB Notification: Performance of prepare postOptimizeDAE: time 1.297e-05/0.7062, allocations: 4 kB / 1.128 GB, free: 356 kB / 0.8731 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.131e-06/0.7062, allocations: 4.312 kB / 1.128 GB, free: 352 kB / 0.8731 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.00109/0.7073, allocations: 309.6 kB / 1.128 GB, free: 40 kB / 0.8731 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000646/0.708, allocations: 135.8 kB / 1.128 GB, free: 15.91 MB / 0.8887 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001368/0.7094, allocations: 0.9056 MB / 1.129 GB, free: 14.98 MB / 0.8887 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001023/0.7104, allocations: 111.6 kB / 1.129 GB, free: 14.87 MB / 0.8887 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.493e-05/0.7105, allocations: 31.98 kB / 1.129 GB, free: 14.84 MB / 0.8887 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 11 * 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 (55): * Single equations (assignments): 54 * 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 {(1,14)} Notification: Performance of prepare postOptimizeDAE: time 0.0002676/0.7108, allocations: 220 kB / 1.129 GB, free: 14.61 MB / 0.8887 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.00024/0.711, allocations: 106.7 kB / 1.129 GB, free: 14.51 MB / 0.8887 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.004585/0.7156, allocations: 1.324 MB / 1.131 GB, free: 13.18 MB / 0.8887 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.378e-05/0.7156, allocations: 4 kB / 1.131 GB, free: 13.18 MB / 0.8887 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.893e-06/0.7156, allocations: 0 / 1.131 GB, free: 13.18 MB / 0.8887 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 8.977e-06/0.7157, allocations: 3.984 kB / 1.131 GB, free: 13.17 MB / 0.8887 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.005929/0.7216, allocations: 2.428 MB / 1.133 GB, free: 10.67 MB / 0.8887 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 7.323e-06/0.7216, allocations: 0 / 1.133 GB, free: 10.67 MB / 0.8887 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0005463/0.7222, allocations: 103.8 kB / 1.133 GB, free: 10.57 MB / 0.8887 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.001069/0.7233, allocations: 308.6 kB / 1.133 GB, free: 10.26 MB / 0.8887 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 5.617e-05/0.7233, allocations: 19.98 kB / 1.133 GB, free: 10.24 MB / 0.8887 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001437/0.7248, allocations: 0.9287 MB / 1.134 GB, free: 9.289 MB / 0.8887 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 6.673e-06/0.7248, allocations: 11.95 kB / 1.134 GB, free: 9.277 MB / 0.8887 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.00422/0.729, allocations: 1.335 MB / 1.136 GB, free: 7.902 MB / 0.8887 GB Notification: Performance of postOpt removeConstants (simulation): time 0.000478/0.7295, allocations: 275.5 kB / 1.136 GB, free: 7.613 MB / 0.8887 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002001/0.7297, allocations: 23.81 kB / 1.136 GB, free: 7.59 MB / 0.8887 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0008777/0.7306, allocations: 79.91 kB / 1.136 GB, free: 7.512 MB / 0.8887 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 9.484e-05/0.7307, allocations: 44.38 kB / 1.136 GB, free: 7.469 MB / 0.8887 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 5.966e-05/0.7308, allocations: 23.98 kB / 1.136 GB, free: 7.445 MB / 0.8887 GB Notification: Performance of sorting global known variables: time 0.0009894/0.7318, allocations: 0.6674 MB / 1.137 GB, free: 6.77 MB / 0.8887 GB Notification: Performance of sort global known variables: time 1.3e-07/0.7318, allocations: 0 / 1.137 GB, free: 6.77 MB / 0.8887 GB Notification: Performance of remove unused functions: time 0.001401/0.7332, allocations: 0.573 MB / 1.137 GB, free: 6.195 MB / 0.8887 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 7 * 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 simulation (42): * Single equations (assignments): 38 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 3 * 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 {(1,16)} Notification: Performance of Backend phase and start with SimCode phase: time 0.004942/0.7381, allocations: 2.162 MB / 1.139 GB, free: 3.988 MB / 0.8887 GB Notification: Performance of simCode: created initialization part: time 0.00374/0.7419, allocations: 1.342 MB / 1.141 GB, free: 2.652 MB / 0.8887 GB Notification: Performance of simCode: created event and clocks part: time 4.749e-06/0.7419, allocations: 0 / 1.141 GB, free: 2.652 MB / 0.8887 GB Notification: Performance of simCode: created simulation system equations: time 0.001179/0.7431, allocations: 468.8 kB / 1.141 GB, free: 2.195 MB / 0.8887 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002064/0.7452, allocations: 498.2 kB / 1.142 GB, free: 1.715 MB / 0.8887 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01633/0.7615, allocations: 8.713 MB / 1.15 GB, free: 8.633 MB / 0.9044 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0006284/0.7622, allocations: 1.066 MB / 1.151 GB, free: 7.539 MB / 0.9044 GB Notification: Performance of simCode: alias equations: time 0.001/0.7632, allocations: 228.9 kB / 1.151 GB, free: 7.316 MB / 0.9044 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0005521/0.7637, allocations: 419.3 kB / 1.152 GB, free: 6.906 MB / 0.9044 GB Notification: Performance of SimCode: time 6.52e-07/0.7638, allocations: 0 / 1.152 GB, free: 6.906 MB / 0.9044 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 3.159/3.923, allocations: 32.99 MB / 1.184 GB, free: 6.383 MB / 0.9356 GB Notification: Performance of buildModelFMU: Generate platform static: time 15.79/19.72, allocations: 10.06 kB / 1.184 GB, free: 6.375 MB / 0.9356 GB (rm -f Buildings_10_Buildings.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow.pipe ; mkfifo Buildings_10_Buildings.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow.pipe ; head -c 1048576 < Buildings_10_Buildings.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow.pipe >> ../files/Buildings_10_Buildings.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator -r=Buildings_10_Buildings.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow_res.mat --tempDir=temp_Buildings_10_Buildings_Fluid_HeatPumps_Validation_Carnot_TCon_reverseFlow_fmu --startTime=0 --stopTime=3600 --timeout=50 --tolerance=1e-06 Buildings_10_Buildings_Fluid_HeatPumps_Validation_Carnot_TCon_reverseFlow.fmu > Buildings_10_Buildings.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow.pipe 2>&1)