Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr ExternalMedia_ExternalMedia.Test.GenericModels.TestRunnerTranscritical.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/ExternalMedia 4.0.0/package.mo", uses=false) Using package ExternalMedia with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ExternalMedia 4.0.0/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: translateModel(ExternalMedia.Test.GenericModels.TestRunnerTranscritical,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ExternalMedia_ExternalMedia.Test.GenericModels.TestRunnerTranscritical") translateModel(ExternalMedia.Test.GenericModels.TestRunnerTranscritical,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ExternalMedia_ExternalMedia.Test.GenericModels.TestRunnerTranscritical") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001069/0.001069, 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 0.001654/0.001654, allocations: 192.8 kB / 16.53 MB, free: 6.391 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.395/1.395, allocations: 222.9 MB / 240.2 MB, free: 4.383 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ExternalMedia 4.0.0/package.mo): time 0.1206/0.1206, allocations: 2.77 MB / 293.1 MB, free: 3.559 MB / 238.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001819/0.001819, allocations: 59.91 kB / 354.4 MB, free: 4.379 MB / 286.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1165/0.1184, allocations: 50.22 MB / 404.6 MB, free: 2.105 MB / 334.1 MB Notification: Performance of NFInst.instantiate(ExternalMedia.Test.GenericModels.TestRunnerTranscritical): time 0.2477/0.3661, allocations: 106.3 MB / 0.499 GB, free: 13.04 MB / 382.1 MB Notification: Performance of NFInst.instExpressions: time 0.06284/0.429, allocations: 59.84 MB / 0.5574 GB, free: 10.16 MB / 430.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.002037/0.4311, allocations: 15.94 kB / 0.5574 GB, free: 10.15 MB / 430.1 MB Notification: Performance of NFTyping.typeComponents: time 0.002855/0.434, allocations: 1.188 MB / 0.5586 GB, free: 8.953 MB / 430.1 MB Notification: Performance of NFTyping.typeBindings: time 0.04088/0.4749, allocations: 13.2 MB / 0.5715 GB, free: 11.71 MB / 446.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.009022/0.484, allocations: 3.191 MB / 0.5746 GB, free: 8.535 MB / 446.1 MB Notification: Performance of NFFlatten.flatten: time 0.004722/0.4887, allocations: 2.961 MB / 0.5775 GB, free: 5.562 MB / 446.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.0005484/0.4893, allocations: 178.9 kB / 0.5777 GB, free: 5.371 MB / 446.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.002146/0.4914, allocations: 1.074 MB / 0.5787 GB, free: 4.293 MB / 446.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.001817/0.4933, allocations: 0.9258 MB / 0.5796 GB, free: 3.363 MB / 446.1 MB Notification: Performance of NFPackage.collectConstants: time 0.0002322/0.4935, allocations: 148 kB / 0.5797 GB, free: 3.219 MB / 446.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.2893/0.7829, allocations: 10.94 MB / 0.5904 GB, free: 20.44 MB / 446.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0004322/0.7833, allocations: 375.1 kB / 0.5908 GB, free: 20.44 MB / 446.1 MB Notification: Performance of NFVerifyModel.verify: time 0.001526/0.7849, allocations: 1.022 MB / 0.5918 GB, free: 20.44 MB / 446.1 MB Notification: Performance of NFConvertDAE.convert: time 0.02926/0.8142, allocations: 8.645 MB / 0.6002 GB, free: 20.26 MB / 446.1 MB Notification: Performance of FrontEnd - DAE generated: time 7.304e-06/0.8142, allocations: 0 / 0.6002 GB, free: 20.26 MB / 446.1 MB Notification: Performance of FrontEnd: time 2.074e-06/0.8142, allocations: 0.8125 kB / 0.6002 GB, free: 20.26 MB / 446.1 MB Notification: Performance of Transformations before backend: time 3.581e-05/0.8143, allocations: 0 / 0.6002 GB, free: 20.26 MB / 446.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 526 * Number of variables: 526 Notification: Performance of Generate backend data structure: time 0.009116/0.8234, allocations: 3.209 MB / 0.6034 GB, free: 18.86 MB / 446.1 MB Notification: Performance of prepare preOptimizeDAE: time 4.11e-05/0.8234, allocations: 11.81 kB / 0.6034 GB, free: 18.86 MB / 446.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.01496/0.8384, allocations: 1.854 MB / 0.6052 GB, free: 18.77 MB / 446.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0028/0.8412, allocations: 1.097 MB / 0.6063 GB, free: 18.5 MB / 446.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0002146/0.8415, allocations: 170.7 kB / 0.6064 GB, free: 18.49 MB / 446.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0003974/0.8419, allocations: 198.8 kB / 0.6066 GB, free: 18.49 MB / 446.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.02433/0.8662, allocations: 6.864 MB / 0.6133 GB, free: 18.07 MB / 446.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 5.435e-05/0.8663, allocations: 5.969 kB / 0.6133 GB, free: 18.07 MB / 446.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0002945/0.8666, allocations: 86.06 kB / 0.6134 GB, free: 18.07 MB / 446.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 7.494e-05/0.8667, allocations: 52.28 kB / 0.6135 GB, free: 18.07 MB / 446.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.02303/0.8897, allocations: 8.233 MB / 0.6215 GB, free: 18.05 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 0.01362/0.9034, allocations: 15.6 MB / 0.6367 GB, free: 23.34 MB / 462.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.01643/0.9198, allocations: 5.649 MB / 0.6422 GB, free: 23.28 MB / 462.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.002145/0.922, allocations: 1.223 MB / 0.6434 GB, free: 23.26 MB / 462.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.1047/1.027, allocations: 52 MB / 0.6942 GB, free: 2.895 MB / 494.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 7.967e-05/1.027, allocations: 56.06 kB / 0.6943 GB, free: 2.848 MB / 494.1 MB Notification: Performance of pre-optimization done (n=242): time 5.811e-06/1.027, allocations: 4 kB / 0.6943 GB, free: 2.844 MB / 494.1 MB Notification: Performance of matching and sorting (n=246): time 0.05024/1.077, allocations: 14.39 MB / 0.7083 GB, free: 6.457 MB / 0.4981 GB Notification: Performance of inlineWhenForInitialization (initialization): time 7.015e-05/1.077, allocations: 107.1 kB / 0.7084 GB, free: 6.332 MB / 0.4981 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0004349/1.078, allocations: 347 kB / 0.7088 GB, free: 5.992 MB / 0.4981 GB Notification: Performance of collectPreVariables (initialization): time 0.0005039/1.078, allocations: 72.42 kB / 0.7088 GB, free: 5.918 MB / 0.4981 GB Notification: Performance of collectInitialEqns (initialization): time 0.000337/1.079, allocations: 0.5431 MB / 0.7094 GB, free: 5.371 MB / 0.4981 GB Notification: Performance of collectInitialBindings (initialization): time 0.00129/1.08, allocations: 0.8145 MB / 0.7102 GB, free: 4.562 MB / 0.4981 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.002186/1.082, allocations: 0.9726 MB / 0.7111 GB, free: 3.582 MB / 0.4981 GB Notification: Performance of setup shared object (initialization): time 0.0001229/1.082, allocations: 318 kB / 0.7114 GB, free: 3.266 MB / 0.4981 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.004214/1.086, allocations: 2.074 MB / 0.7134 GB, free: 1.188 MB / 0.4981 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.004735/1.091, allocations: 2.638 MB / 0.716 GB, free: 14.33 MB / 0.5137 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.008589/1.1, allocations: 4.508 MB / 0.7204 GB, free: 9.664 MB / 0.5137 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.637e-05/1.1, allocations: 7.094 kB / 0.7204 GB, free: 9.66 MB / 0.5137 GB Notification: Performance of matching and sorting (n=308) (initialization): time 0.01245/1.112, allocations: 5.556 MB / 0.7258 GB, free: 4.188 MB / 0.5137 GB Notification: Performance of prepare postOptimizeDAE: time 3.718e-05/1.112, allocations: 15.78 kB / 0.7259 GB, free: 4.176 MB / 0.5137 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.55e-05/1.112, allocations: 16 kB / 0.7259 GB, free: 4.16 MB / 0.5137 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.001585/1.114, allocations: 302.3 kB / 0.7262 GB, free: 3.855 MB / 0.5137 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.003614/1.118, allocations: 1.072 MB / 0.7272 GB, free: 2.816 MB / 0.5137 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002001/1.12, allocations: 1.893 MB / 0.7291 GB, free: 0.8594 MB / 0.5137 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002295/1.122, allocations: 87.97 kB / 0.7291 GB, free: 0.7734 MB / 0.5137 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0009221/1.123, allocations: 403.6 kB / 0.7295 GB, free: 388 kB / 0.5137 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 73 * Number of states: 0 () * Number of discrete variables: 17 (testBasePropertiesDynamic.medium.phase,testBasePropertiesImplicit.medium2.baseProperties.phase,testBasePropertiesImplicit.medium1.baseProperties.phase,testBasePropertiesExplicit.medium2.baseProperties.phase,testBasePropertiesExplicit.medium1.baseProperties.phase,testStatesSat.state2.phase,testStatesSat.state1.phase,testStates.state2.phase,testStates.state1.phase,testStatesSat.completeBubbleDewStates2.bubbleStateTwoPhase.state.phase,testStatesSat.completeBubbleDewStates2.bubbleStateOnePhase.state.phase,testStatesSat.completeBubbleDewStates2.dewStateTwoPhase.state.phase,testStatesSat.completeBubbleDewStates2.dewStateOnePhase.state.phase,testStatesSat.completeBubbleDewStates1.bubbleStateTwoPhase.state.phase,testStatesSat.completeBubbleDewStates1.bubbleStateOnePhase.state.phase,testStatesSat.completeBubbleDewStates1.dewStateTwoPhase.state.phase,testStatesSat.completeBubbleDewStates1.dewStateOnePhase.state.phase) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (293): * Single equations (assignments): 287 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 3 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 3 * 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): 3 systems {(3,8), (1,1), (1,1)} Notification: Performance of prepare postOptimizeDAE: time 0.002041/1.125, allocations: 437.4 kB / 0.7299 GB, free: 15.98 MB / 0.5294 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.001199/1.126, allocations: 110.9 kB / 0.7301 GB, free: 15.87 MB / 0.5294 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.04802/1.174, allocations: 46.86 MB / 0.7758 GB, free: 0.957 MB / 0.5606 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 0.0001802/1.174, allocations: 163.7 kB / 0.776 GB, free: 0.7969 MB / 0.5606 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 2.526e-05/1.174, allocations: 4 kB / 0.776 GB, free: 0.793 MB / 0.5606 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 8.004e-05/1.174, allocations: 15.95 kB / 0.776 GB, free: 0.7773 MB / 0.5606 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.2712/1.446, allocations: 65.7 MB / 0.8401 GB, free: 226.3 MB / 0.5606 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.805e-05/1.446, allocations: 4 kB / 0.8402 GB, free: 226.3 MB / 0.5606 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.003278/1.449, allocations: 0.6765 MB / 0.8408 GB, free: 225.9 MB / 0.5606 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.000901/1.45, allocations: 0.5067 MB / 0.8413 GB, free: 225.5 MB / 0.5606 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0005116/1.45, allocations: 78.78 kB / 0.8414 GB, free: 225.4 MB / 0.5606 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001187/1.452, allocations: 2.035 MB / 0.8434 GB, free: 223.4 MB / 0.5606 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.573e-06/1.452, allocations: 0 / 0.8434 GB, free: 223.4 MB / 0.5606 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.01221/1.464, allocations: 10.92 MB / 0.854 GB, free: 213.5 MB / 0.5606 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0005136/1.464, allocations: 433.4 kB / 0.8545 GB, free: 213.1 MB / 0.5606 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0003477/1.465, allocations: 48 kB / 0.8545 GB, free: 213.1 MB / 0.5606 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001371/1.466, allocations: 94.05 kB / 0.8546 GB, free: 213 MB / 0.5606 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.000358/1.467, allocations: 190.6 kB / 0.8548 GB, free: 212.9 MB / 0.5606 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001948/1.467, allocations: 104.5 kB / 0.8549 GB, free: 212.8 MB / 0.5606 GB Notification: Performance of sorting global known variables: time 0.0001919/1.467, allocations: 208.9 kB / 0.8551 GB, free: 212.6 MB / 0.5606 GB Notification: Performance of sort global known variables: time 1.5e-07/1.467, allocations: 0 / 0.8551 GB, free: 212.6 MB / 0.5606 GB Notification: Performance of remove unused functions: time 0.005468/1.472, allocations: 1.741 MB / 0.8568 GB, free: 211 MB / 0.5606 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 2 (testBasePropertiesDynamic.medium.p,testBasePropertiesDynamic.medium.h) * Number of discrete variables: 80 ($cse1.region3boundary,$cse2.region3boundary,$cse3.region3boundary,$cse4.region3boundary,$cse5.phase,$cse5.region,$cse6.phase,$cse6.region,$cse7.region3boundary,$cse8.region3boundary,$cse9.region3boundary,$cse10.region3boundary,$cse11.phase,$cse11.region,$cse12.phase,$cse12.region,$cse13.region3boundary,$cse14.region3boundary,$cse15.phase,$cse15.region,$cse16.phase,$cse16.region,$cse17.region3boundary,$cse18.region3boundary,$cse19.phase,$cse19.region,$cse20.phase,$cse20.region,$cse21.phase,$cse21.region,$cse22.phase,$cse22.region,$cse23.phase,$cse23.region,$cse24.phase,$cse24.region,$cse25.phase,$cse25.region,$cse26.phase,$cse26.region,$cse27.phase,$cse27.region,$cse28.phase,$cse28.region,$cse29.phase,$cse29.region,$cse30.phase,$cse30.region,$cse31.phase,$cse31.region,$cse32.phase,$cse32.region,$cse33.region3boundary,$cse34.region3boundary,$cse35.region3boundary,$cse36.region3boundary,$cse37.region3boundary,$cse38.region3boundary,$cse39.region3boundary,$cse40.region3boundary,$cse41.phase,$cse41.region,$cse42.phase,$cse42.region,$cse43.phase,$cse43.region,$cse44.phase,$cse44.region,$cse45.region3boundary,$cse46.phase,$cse46.region,$cse47.region3boundary,$cse48.region3boundary,$cse49.phase,$cse49.region,testBasePropertiesExplicit.medium1.baseProperties.phase,testBasePropertiesExplicit.medium2.baseProperties.phase,testBasePropertiesImplicit.medium1.baseProperties.phase,testBasePropertiesImplicit.medium2.baseProperties.phase,testBasePropertiesDynamic.medium.phase) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (287): * Single equations (assignments): 234 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 50 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 3 * 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): 3 systems {(1,1), (1,2), (1,2)} Notification: Performance of Backend phase and start with SimCode phase: time 0.005687/1.478, allocations: 1.588 MB / 0.8583 GB, free: 209.9 MB / 0.5606 GB Notification: Performance of simCode: created initialization part: time 0.02661/1.505, allocations: 5.925 MB / 0.8641 GB, free: 204.8 MB / 0.5606 GB Notification: Performance of simCode: created event and clocks part: time 5.18e-06/1.505, allocations: 0 / 0.8641 GB, free: 204.8 MB / 0.5606 GB Notification: Performance of simCode: created simulation system equations: time 0.004338/1.509, allocations: 3.761 MB / 0.8678 GB, free: 201.3 MB / 0.5606 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003323/1.513, allocations: 0.6435 MB / 0.8684 GB, free: 200.9 MB / 0.5606 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.008142/1.521, allocations: 7.816 MB / 0.876 GB, free: 193.9 MB / 0.5606 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0009072/1.522, allocations: 1.928 MB / 0.8779 GB, free: 192.3 MB / 0.5606 GB Notification: Performance of simCode: alias equations: time 0.008868/1.53, allocations: 11.74 MB / 0.8894 GB, free: 181.3 MB / 0.5606 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001893/1.532, allocations: 498.9 kB / 0.8899 GB, free: 180.8 MB / 0.5606 GB Notification: Performance of SimCode: time 7.72e-07/1.532, allocations: 0 / 0.8899 GB, free: 180.8 MB / 0.5606 GB Notification: Performance of Templates: time 0.1156/1.648, allocations: 108.7 MB / 0.996 GB, free: 72.32 MB / 0.5606 GB make -j1 -f ExternalMedia_ExternalMedia.Test.GenericModels.TestRunnerTranscritical.makefile (rm -f ExternalMedia_ExternalMedia.Test.GenericModels.TestRunnerTranscritical.pipe ; mkfifo ExternalMedia_ExternalMedia.Test.GenericModels.TestRunnerTranscritical.pipe ; head -c 1048576 < ExternalMedia_ExternalMedia.Test.GenericModels.TestRunnerTranscritical.pipe >> ../files/ExternalMedia_ExternalMedia.Test.GenericModels.TestRunnerTranscritical.sim & ./ExternalMedia_ExternalMedia.Test.GenericModels.TestRunnerTranscritical -abortSlowSimulation -alarm=480 -lv LOG_STATS > ExternalMedia_ExternalMedia.Test.GenericModels.TestRunnerTranscritical.pipe 2>&1)