Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Modelica_3.1_Modelica.Fluid.Examples.Explanatory.MeasuringTemperature.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 3.2.3+maint.om/package.mo", uses=false) Using package Modelica with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+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: translateModel(Modelica.Fluid.Examples.Explanatory.MeasuringTemperature,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Modelica_3.1_Modelica.Fluid.Examples.Explanatory.MeasuringTemperature") translateModel(Modelica.Fluid.Examples.Explanatory.MeasuringTemperature,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Modelica_3.1_Modelica.Fluid.Examples.Explanatory.MeasuringTemperature") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.006131/0.006131, allocations: 100.1 kB / 15.73 MB, free: 6.008 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001369/0.001369, allocations: 194.5 kB / 16.68 MB, free: 5.93 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.648/1.648, allocations: 205.1 MB / 222.5 MB, free: 4.492 MB / 174.1 MB Notification: Modelica requested package Complex of version 3.2.3. Complex 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Modelica requested package ModelicaServices of version 3.2.3. ModelicaServices 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.00128/0.00128, allocations: 45.69 kB / 326.5 MB, free: 14.29 MB / 270.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1287/0.13, allocations: 46.62 MB / 373.2 MB, free: 1.328 MB / 302.1 MB Notification: Performance of NFInst.instantiate(Modelica.Fluid.Examples.Explanatory.MeasuringTemperature): time 0.3873/0.5174, allocations: 93.94 MB / 467.1 MB, free: 2.348 MB / 382.1 MB Notification: Performance of NFInst.instExpressions: time 0.03949/0.5569, allocations: 34.34 MB / 0.4897 GB, free: 1.512 MB / 382.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.003817/0.5607, allocations: 50.16 kB / 0.4897 GB, free: 1.512 MB / 382.1 MB Notification: Performance of NFTyping.typeComponents: time 0.005258/0.5661, allocations: 1.33 MB / 0.491 GB, free: 1.48 MB / 382.1 MB Notification: Performance of NFTyping.typeBindings: time 0.01424/0.5803, allocations: 4.566 MB / 0.4955 GB, free: 15.64 MB / 398.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.03256/0.6129, allocations: 8.717 MB / 0.504 GB, free: 11.08 MB / 398.1 MB Notification: Performance of NFFlatten.flatten: time 0.01045/0.6234, allocations: 6.194 MB / 0.5101 GB, free: 7.789 MB / 398.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.004041/0.6274, allocations: 1.996 MB / 0.512 GB, free: 6.539 MB / 398.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.01665/0.6441, allocations: 5.82 MB / 0.5177 GB, free: 1.195 MB / 398.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.005598/0.6498, allocations: 2.151 MB / 0.5198 GB, free: 15.22 MB / 414.1 MB Notification: Performance of NFPackage.collectConstants: time 0.001529/0.6513, allocations: 256 kB / 0.52 GB, free: 14.97 MB / 414.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.02511/0.6764, allocations: 9.132 MB / 0.5289 GB, free: 5.973 MB / 414.1 MB Notification: Performance of NFScalarize.scalarize: time 0.002217/0.6787, allocations: 0.854 MB / 0.5298 GB, free: 5.141 MB / 414.1 MB Notification: Performance of NFVerifyModel.verify: time 0.003759/0.6825, allocations: 1.35 MB / 0.5311 GB, free: 3.809 MB / 414.1 MB Notification: Performance of NFConvertDAE.convert: time 0.02652/0.709, allocations: 8.662 MB / 0.5396 GB, free: 11.56 MB / 430.1 MB Notification: Performance of FrontEnd - DAE generated: time 7.885e-06/0.7091, allocations: 0 / 0.5396 GB, free: 11.56 MB / 430.1 MB Notification: Performance of FrontEnd: time 1.663e-06/0.7091, allocations: 0 / 0.5396 GB, free: 11.56 MB / 430.1 MB Notification: Performance of Transformations before backend: time 0.0001333/0.7092, allocations: 0 / 0.5396 GB, free: 11.56 MB / 430.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 462 * Number of variables: 462 Notification: Performance of Generate backend data structure: time 0.01208/0.7213, allocations: 3.431 MB / 0.5429 GB, free: 8.105 MB / 430.1 MB Notification: Performance of prepare preOptimizeDAE: time 4.476e-05/0.7214, allocations: 12.03 kB / 0.5429 GB, free: 8.094 MB / 430.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.01167/0.733, allocations: 1.21 MB / 0.5441 GB, free: 6.891 MB / 430.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.00358/0.7367, allocations: 1.412 MB / 0.5455 GB, free: 5.445 MB / 430.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.000438/0.7371, allocations: 345 kB / 0.5458 GB, free: 5.078 MB / 430.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0007941/0.7379, allocations: 185.3 kB / 0.546 GB, free: 4.906 MB / 430.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.01016/0.7481, allocations: 3.411 MB / 0.5493 GB, free: 1.395 MB / 430.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 7.663e-05/0.7482, allocations: 11.84 kB / 0.5493 GB, free: 1.383 MB / 430.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0004904/0.7487, allocations: 82.64 kB / 0.5494 GB, free: 1.309 MB / 430.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0001579/0.7489, allocations: 111.3 kB / 0.5495 GB, free: 1.199 MB / 430.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.009446/0.7583, allocations: 3.404 MB / 0.5528 GB, free: 13.79 MB / 446.1 MB 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 0.02424/0.7826, allocations: 14.34 MB / 0.5668 GB, free: 14.67 MB / 462.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.007578/0.7902, allocations: 2.822 MB / 0.5696 GB, free: 11.84 MB / 462.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.002725/0.793, allocations: 1.42 MB / 0.571 GB, free: 10.42 MB / 462.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.05067/0.8437, allocations: 24.35 MB / 0.5948 GB, free: 15.19 MB / 494.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 7.464e-05/0.8438, allocations: 64.55 kB / 0.5948 GB, free: 15.12 MB / 494.1 MB Notification: Performance of preOpt simplifyInStream (simulation): time 0.002117/0.8459, allocations: 318.6 kB / 0.5951 GB, free: 14.82 MB / 494.1 MB Notification: Performance of pre-optimization done (n=175): time 9.909e-06/0.8459, allocations: 0 / 0.5951 GB, free: 14.82 MB / 494.1 MB Notification: Performance of matching and sorting (n=205): time 0.04054/0.8865, allocations: 12 MB / 0.6069 GB, free: 2.762 MB / 494.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001011/0.8866, allocations: 154.5 kB / 0.607 GB, free: 2.578 MB / 494.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002223/0.8888, allocations: 1.4 MB / 0.6084 GB, free: 1.168 MB / 494.1 MB Notification: Performance of collectPreVariables (initialization): time 0.000242/0.8891, allocations: 65.7 kB / 0.6084 GB, free: 1.098 MB / 494.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.0006173/0.8897, allocations: 0.7891 MB / 0.6092 GB, free: 312 kB / 494.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.000655/0.8904, allocations: 0.6693 MB / 0.6099 GB, free: 15.64 MB / 0.4981 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0007777/0.8912, allocations: 451.7 kB / 0.6103 GB, free: 15.19 MB / 0.4981 GB Notification: Performance of setup shared object (initialization): time 0.0001025/0.8913, allocations: 305.1 kB / 0.6106 GB, free: 14.89 MB / 0.4981 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.00264/0.8939, allocations: 1.265 MB / 0.6118 GB, free: 13.62 MB / 0.4981 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.002983/0.8969, allocations: 1.709 MB / 0.6135 GB, free: 11.74 MB / 0.4981 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.005384/0.9023, allocations: 2.915 MB / 0.6163 GB, free: 8.676 MB / 0.4981 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 7.574e-06/0.9023, allocations: 4 kB / 0.6163 GB, free: 8.672 MB / 0.4981 GB Notification: Performance of matching and sorting (n=272) (initialization): time 0.007993/0.9103, allocations: 3.946 MB / 0.6202 GB, free: 4.688 MB / 0.4981 GB Notification: Performance of prepare postOptimizeDAE: time 3.562e-05/0.9104, allocations: 8 kB / 0.6202 GB, free: 4.68 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.338e-05/0.9104, allocations: 12 kB / 0.6202 GB, free: 4.668 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.004681/0.9151, allocations: 1.572 MB / 0.6217 GB, free: 3.07 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.00197/0.9171, allocations: 455.3 kB / 0.6222 GB, free: 2.625 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.006218/0.9233, allocations: 6.699 MB / 0.6287 GB, free: 11.7 MB / 0.5137 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002119/0.9255, allocations: 119.9 kB / 0.6288 GB, free: 11.58 MB / 0.5137 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002764/0.9258, allocations: 119.9 kB / 0.6289 GB, free: 11.46 MB / 0.5137 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 50 * Number of states: 0 () * Number of discrete variables: 21 (mFlow3.medium.phase,openTankHot3.inFlow[1],openTankHot3.regularFlow[1],openTankHot3.heatTransfer.states[1].phase,openTankCold3.inFlow[1],openTankCold3.regularFlow[1],openTankCold3.heatTransfer.states[1].phase,mFlow2.medium.phase,mFlow1.medium.phase,openTankHot2.inFlow[1],openTankHot2.regularFlow[1],openTankHot2.heatTransfer.states[1].phase,openTankHot1.inFlow[1],openTankHot1.regularFlow[1],openTankHot1.heatTransfer.states[1].phase,openTankCold1.inFlow[1],openTankCold1.regularFlow[1],openTankCold1.heatTransfer.states[1].phase,openTankCold2.inFlow[1],openTankCold2.regularFlow[1],openTankCold2.heatTransfer.states[1].phase) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (213): * Single equations (assignments): 204 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 9 * 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): 9 systems {(1,5), (1,5), (4,6), (1,5), (1,5), (4,6), (1,5), (1,5), (6,6)} Notification: Performance of prepare postOptimizeDAE: time 0.001139/0.9269, allocations: 0.5078 MB / 0.6294 GB, free: 10.94 MB / 0.5137 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0006262/0.9276, allocations: 197.7 kB / 0.6296 GB, free: 10.75 MB / 0.5137 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.01442/0.942, allocations: 9.813 MB / 0.6392 GB, free: 0.8125 MB / 0.5137 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 8.864e-05/0.9421, allocations: 107.8 kB / 0.6393 GB, free: 0.707 MB / 0.5137 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.343e-05/0.9421, allocations: 0 / 0.6393 GB, free: 0.707 MB / 0.5137 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 2.788e-05/0.9422, allocations: 15.95 kB / 0.6393 GB, free: 0.6914 MB / 0.5137 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.2702/1.212, allocations: 13.23 MB / 0.6523 GB, free: 200.3 MB / 0.5137 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.529e-05/1.212, allocations: 0 / 0.6523 GB, free: 200.3 MB / 0.5137 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001923/1.214, allocations: 369.5 kB / 0.6526 GB, free: 200.3 MB / 0.5137 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.005/1.219, allocations: 2.937 MB / 0.6555 GB, free: 199.5 MB / 0.5137 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0003962/1.22, allocations: 62.55 kB / 0.6555 GB, free: 199.5 MB / 0.5137 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.006454/1.226, allocations: 8.774 MB / 0.6641 GB, free: 193.1 MB / 0.5137 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.464e-06/1.226, allocations: 0 / 0.6641 GB, free: 193.1 MB / 0.5137 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.01369/1.24, allocations: 10.7 MB / 0.6745 GB, free: 188.1 MB / 0.5137 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001351/1.241, allocations: 0.6949 MB / 0.6752 GB, free: 187.7 MB / 0.5137 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0004139/1.242, allocations: 103.1 kB / 0.6753 GB, free: 187.6 MB / 0.5137 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001714/1.244, allocations: 151.9 kB / 0.6755 GB, free: 187.5 MB / 0.5137 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0004596/1.244, allocations: 219.3 kB / 0.6757 GB, free: 187.3 MB / 0.5137 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001588/1.244, allocations: 91.94 kB / 0.6758 GB, free: 187.2 MB / 0.5137 GB Notification: Performance of sorting global known variables: time 0.001491/1.246, allocations: 1.273 MB / 0.677 GB, free: 185.9 MB / 0.5137 GB Notification: Performance of sort global known variables: time 1.4e-07/1.246, allocations: 0 / 0.677 GB, free: 185.9 MB / 0.5137 GB Notification: Performance of remove unused functions: time 0.005351/1.251, allocations: 1.782 MB / 0.6788 GB, free: 184.2 MB / 0.5137 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 12 (openTankCold2.level,openTankCold2.medium.h,openTankCold1.level,openTankCold1.medium.h,openTankHot1.level,openTankHot1.medium.h,openTankHot2.level,openTankHot2.medium.h,openTankCold3.level,openTankCold3.medium.h,openTankHot3.level,openTankHot3.medium.h) * Number of discrete variables: 71 ($cse4.phase,$cse4.region,$cse7.phase,$cse7.region,$cse8.phase,$cse8.region,$cse13.phase,$cse13.region,$cse15.phase,$cse15.region,$cse18.phase,$cse18.region,$cse20.phase,$cse20.region,$cse23.phase,$cse23.region,$cse25.phase,$cse25.region,$cse28.phase,$cse28.region,$cse30.phase,$cse30.region,$cse31.region3boundary,$cse32.region3boundary,$cse33.phase,$cse33.region,$cse34.phase,$cse34.region,$cse35.region3boundary,$cse36.region3boundary,$cse37.phase,$cse37.region,$cse38.phase,$cse38.region,$cse39.phase,$cse39.region,$cse43.phase,$cse43.region,$cse45.phase,$cse45.region,$cse48.phase,$cse48.region,$cse50.phase,$cse50.region,$cse51.region3boundary,$cse52.region3boundary,$cse53.phase,$cse53.region,$cse54.phase,$cse54.region,openTankCold2.heatTransfer.states[1].phase,openTankCold2.regularFlow[1],openTankCold2.inFlow[1],openTankCold1.heatTransfer.states[1].phase,openTankCold1.regularFlow[1],openTankCold1.inFlow[1],openTankHot1.heatTransfer.states[1].phase,openTankHot1.regularFlow[1],openTankHot1.inFlow[1],openTankHot2.heatTransfer.states[1].phase,openTankHot2.regularFlow[1],openTankHot2.inFlow[1],mFlow1.medium.phase,mFlow2.medium.phase,openTankCold3.heatTransfer.states[1].phase,openTankCold3.regularFlow[1],openTankCold3.inFlow[1],openTankHot3.heatTransfer.states[1].phase,openTankHot3.regularFlow[1],openTankHot3.inFlow[1],mFlow3.medium.phase) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (173): * Single equations (assignments): 145 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 19 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 9 * 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): 9 systems {(2,4), (2,4), (4,11), (2,4), (2,4), (4,11), (2,4), (2,4), (6,11)} Notification: Performance of Backend phase and start with SimCode phase: time 0.007235/1.258, allocations: 1.754 MB / 0.6805 GB, free: 182.8 MB / 0.5137 GB Notification: Performance of simCode: created initialization part: time 0.01002/1.268, allocations: 4.239 MB / 0.6846 GB, free: 178.6 MB / 0.5137 GB Notification: Performance of simCode: created event and clocks part: time 1.121e-05/1.268, allocations: 0.5625 kB / 0.6846 GB, free: 178.6 MB / 0.5137 GB Notification: Performance of simCode: created simulation system equations: time 0.006171/1.275, allocations: 3.123 MB / 0.6877 GB, free: 175.5 MB / 0.5137 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.006844/1.282, allocations: 1.089 MB / 0.6887 GB, free: 174.5 MB / 0.5137 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01391/1.295, allocations: 7.821 MB / 0.6964 GB, free: 166.8 MB / 0.5137 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.002112/1.298, allocations: 2.169 MB / 0.6985 GB, free: 164.6 MB / 0.5137 GB Notification: Performance of simCode: alias equations: time 0.00347/1.301, allocations: 1.742 MB / 0.7002 GB, free: 162.9 MB / 0.5137 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0008946/1.302, allocations: 187.4 kB / 0.7004 GB, free: 162.7 MB / 0.5137 GB Notification: Performance of SimCode: time 7.11e-07/1.302, allocations: 3.938 kB / 0.7004 GB, free: 162.7 MB / 0.5137 GB Notification: Performance of Templates: time 0.1186/1.421, allocations: 96.04 MB / 0.7942 GB, free: 66.49 MB / 0.5137 GB make -j1 -f Modelica_3.1_Modelica.Fluid.Examples.Explanatory.MeasuringTemperature.makefile (rm -f Modelica_3.1_Modelica.Fluid.Examples.Explanatory.MeasuringTemperature.pipe ; mkfifo Modelica_3.1_Modelica.Fluid.Examples.Explanatory.MeasuringTemperature.pipe ; head -c 1048576 < Modelica_3.1_Modelica.Fluid.Examples.Explanatory.MeasuringTemperature.pipe >> ../files/Modelica_3.1_Modelica.Fluid.Examples.Explanatory.MeasuringTemperature.sim & ./Modelica_3.1_Modelica.Fluid.Examples.Explanatory.MeasuringTemperature -abortSlowSimulation -alarm=480 -lv LOG_STATS > Modelica_3.1_Modelica.Fluid.Examples.Explanatory.MeasuringTemperature.pipe 2>&1)