Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_maint.8.0.x_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo", uses=false) Using package ModelicaServices with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo) 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 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo) Using package Buildings with version 8.0.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/package.mo) Running command: translateModel(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9,tolerance=1e-06,outputFormat="empty",numberOfIntervals=172800,variableFilter="",fileNamePrefix="Buildings_maint.8.0.x_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9") translateModel(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9,tolerance=1e-06,outputFormat="empty",numberOfIntervals=172800,variableFilter="",fileNamePrefix="Buildings_maint.8.0.x_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/package.mo): time 1.511/1.511, allocations: 288.4 MB / 303.6 MB, free: 8.215 MB / 234.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo): time 0.000919/0.000919, allocations: 188.5 kB / 372.3 MB, free: 10.13 MB / 298.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.259/1.259, allocations: 205.4 MB / 0.631 GB, free: 9.887 MB / 458.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo): time 0.0007297/0.0007297, allocations: 94.3 kB / 0.7444 GB, free: 5.809 MB / 0.5573 GB Notification: Performance of FrontEnd - loaded program: time 0.0003842/0.0003844, allocations: 14.78 kB / 0.8675 GB, free: 141.8 MB / 0.6198 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.175/0.1754, allocations: 115.3 MB / 0.9801 GB, free: 27.37 MB / 0.6198 GB Notification: Performance of NFInst.instantiate(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9): time 0.5156/0.6911, allocations: 143.3 MB / 1.12 GB, free: 1.707 MB / 0.6823 GB Notification: Performance of NFInst.instExpressions: time 0.02271/0.7138, allocations: 20.62 MB / 1.14 GB, free: 13.52 MB / 0.698 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.00238/0.7163, allocations: 50.25 kB / 1.14 GB, free: 13.5 MB / 0.698 GB Notification: Performance of NFTyping.typeComponents: time 0.003002/0.7193, allocations: 3.1 MB / 1.143 GB, free: 12.66 MB / 0.698 GB Notification: Performance of NFTyping.typeBindings: time 0.002726/0.722, allocations: 1.907 MB / 1.145 GB, free: 11.69 MB / 0.698 GB Notification: Performance of NFTyping.typeClassSections: time 0.001818/0.7239, allocations: 0.5778 MB / 1.146 GB, free: 11.45 MB / 0.698 GB Notification: Performance of NFFlatten.flatten: time 0.002896/0.7268, allocations: 2.256 MB / 1.148 GB, free: 10.59 MB / 0.698 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001746/0.7285, allocations: 1.273 MB / 1.149 GB, free: 10.02 MB / 0.698 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001826/0.7304, allocations: 1.061 MB / 1.15 GB, free: 9.582 MB / 0.698 GB Notification: Performance of NFSimplifyModel.simplify: time 0.002407/0.7328, allocations: 1.882 MB / 1.152 GB, free: 8.836 MB / 0.698 GB Notification: Performance of NFPackage.collectConstants: time 0.0001727/0.733, allocations: 48.66 kB / 1.152 GB, free: 8.836 MB / 0.698 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0003815/0.7334, allocations: 90.08 kB / 1.152 GB, free: 8.828 MB / 0.698 GB Notification: Performance of NFScalarize.scalarize: time 0.0005955/0.734, allocations: 0.7338 MB / 1.153 GB, free: 8.531 MB / 0.698 GB Notification: Performance of NFVerifyModel.verify: time 0.0007737/0.7347, allocations: 0.9638 MB / 1.154 GB, free: 8.012 MB / 0.698 GB Notification: Performance of NFConvertDAE.convert: time 0.00165/0.7364, allocations: 1.908 MB / 1.156 GB, free: 6.945 MB / 0.698 GB Notification: Performance of FrontEnd - DAE generated: time 5.651e-06/0.7364, allocations: 1.156 kB / 1.156 GB, free: 6.945 MB / 0.698 GB Notification: Performance of FrontEnd: time 1.503e-06/0.7364, allocations: 0 / 1.156 GB, free: 6.945 MB / 0.698 GB Notification: Performance of Transformations before backend: time 3.383e-05/0.7365, allocations: 0 / 1.156 GB, free: 6.945 MB / 0.698 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 213 * Number of variables: 213 Notification: Performance of Generate backend data structure: time 0.00466/0.7411, allocations: 2.822 MB / 1.158 GB, free: 5.023 MB / 0.698 GB Notification: Performance of prepare preOptimizeDAE: time 4.659e-05/0.7412, allocations: 9.469 kB / 1.158 GB, free: 5.023 MB / 0.698 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.000464/0.7417, allocations: 344.5 kB / 1.159 GB, free: 4.84 MB / 0.698 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001752/0.7434, allocations: 1.396 MB / 1.16 GB, free: 3.891 MB / 0.698 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001604/0.7436, allocations: 115.9 kB / 1.16 GB, free: 3.848 MB / 0.698 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001313/0.7437, allocations: 90.73 kB / 1.16 GB, free: 3.844 MB / 0.698 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001666/0.7454, allocations: 1.006 MB / 1.161 GB, free: 3.562 MB / 0.698 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.274e-05/0.7454, allocations: 5.531 kB / 1.161 GB, free: 3.559 MB / 0.698 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 7.307e-05/0.7455, allocations: 39.2 kB / 1.161 GB, free: 3.555 MB / 0.698 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.937e-05/0.7455, allocations: 19.38 kB / 1.161 GB, free: 3.555 MB / 0.698 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001539/0.7471, allocations: 0.8637 MB / 1.162 GB, free: 3.395 MB / 0.698 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.006298/0.7534, allocations: 4.619 MB / 1.167 GB, free: 0.8555 MB / 0.698 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001729/0.7552, allocations: 0.9958 MB / 1.168 GB, free: 0.6836 MB / 0.698 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0008317/0.756, allocations: 0.5561 MB / 1.168 GB, free: 0.5977 MB / 0.698 GB Notification: Performance of preOpt evalFunc (simulation): time 6.195e-05/0.7561, allocations: 24.03 kB / 1.168 GB, free: 0.5859 MB / 0.698 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0009096/0.757, allocations: 0.5933 MB / 1.169 GB, free: 396 kB / 0.698 GB Notification: Performance of pre-optimization done (n=101): time 3.817e-06/0.757, allocations: 0 / 1.169 GB, free: 396 kB / 0.698 GB Notification: Performance of matching and sorting (n=101): time 0.00472/0.7617, allocations: 2.362 MB / 1.171 GB, free: 15.55 MB / 0.7136 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.313e-05/0.7618, allocations: 63.09 kB / 1.171 GB, free: 15.49 MB / 0.7136 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.005059/0.7669, allocations: 5.094 MB / 1.176 GB, free: 13.57 MB / 0.7136 GB Notification: Performance of collectPreVariables (initialization): time 0.0001572/0.767, allocations: 49.23 kB / 1.176 GB, free: 13.53 MB / 0.7136 GB Notification: Performance of collectInitialEqns (initialization): time 0.001034/0.7681, allocations: 1.373 MB / 1.178 GB, free: 12.35 MB / 0.7136 GB Notification: Performance of collectInitialBindings (initialization): time 0.0003444/0.7684, allocations: 326.2 kB / 1.178 GB, free: 12.07 MB / 0.7136 GB Notification: Performance of simplifyInitialFunctions (initialization): time 4.74e-05/0.7685, allocations: 18.5 kB / 1.178 GB, free: 12.06 MB / 0.7136 GB Notification: Performance of setup shared object (initialization): time 0.0001257/0.7686, allocations: 352.4 kB / 1.178 GB, free: 11.72 MB / 0.7136 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0008226/0.7695, allocations: 439.9 kB / 1.179 GB, free: 11.52 MB / 0.7136 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0008808/0.7703, allocations: 0.6159 MB / 1.179 GB, free: 11.11 MB / 0.7136 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001578/0.7719, allocations: 1.012 MB / 1.18 GB, free: 10.54 MB / 0.7136 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.418e-06/0.772, allocations: 0 / 1.18 GB, free: 10.54 MB / 0.7136 GB Notification: Performance of matching and sorting (n=130) (initialization): time 0.003065/0.775, allocations: 1.65 MB / 1.182 GB, free: 9.699 MB / 0.7136 GB Notification: Performance of prepare postOptimizeDAE: time 2.087e-05/0.7751, allocations: 5.75 kB / 1.182 GB, free: 9.699 MB / 0.7136 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.237e-05/0.7751, allocations: 5.062 kB / 1.182 GB, free: 9.699 MB / 0.7136 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0006728/0.7758, allocations: 260.3 kB / 1.182 GB, free: 9.578 MB / 0.7136 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0006907/0.7765, allocations: 199.5 kB / 1.182 GB, free: 9.527 MB / 0.7136 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.004086/0.7806, allocations: 4.366 MB / 1.187 GB, free: 5.711 MB / 0.7136 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001277/0.7819, allocations: 159.1 kB / 1.187 GB, free: 5.555 MB / 0.7136 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.669e-05/0.7819, allocations: 36 kB / 1.187 GB, free: 5.52 MB / 0.7136 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 16 * Number of states: 0 () * Number of discrete variables: 41 ($PRE.assEqu.nFai,assEqu.nFai,$whenCondition9,$whenCondition8,$PRE.intGai.nextTimeEvent,$whenCondition7,$PRE.reference.nextTimeEvent,$whenCondition6,$PRE.outdoorTemp.nextTimeEvent,$whenCondition5,$PRE.tableSolRadWindow.nextTimeEvent,$whenCondition4,$PRE.tableSolRadWall.nextTimeEvent,$whenCondition3,$PRE.HSky.nextTimeEvent,$whenCondition1,$whenCondition2,reference.nextTimeEvent,$PRE.reference.nextTimeEventScaled,reference.nextTimeEventScaled,$PRE.assEqu.satisfied,assEqu.satisfied,$PRE.mean.y,mean.y,intGai.nextTimeEvent,$PRE.intGai.nextTimeEventScaled,intGai.nextTimeEventScaled,outdoorTemp.nextTimeEvent,$PRE.outdoorTemp.nextTimeEventScaled,outdoorTemp.nextTimeEventScaled,tableSolRadWindow.nextTimeEvent,$PRE.tableSolRadWindow.nextTimeEventScaled,tableSolRadWindow.nextTimeEventScaled,greaterThreshold1.y,greaterThreshold2.y,tableSolRadWall.nextTimeEvent,$PRE.tableSolRadWall.nextTimeEventScaled,tableSolRadWall.nextTimeEventScaled,HSky.nextTimeEvent,$PRE.HSky.nextTimeEventScaled,HSky.nextTimeEventScaled) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (108): * Single equations (assignments): 106 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 2 {(1,100.0%) 3,(2,100.0%) 18} * Non-linear torn systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.00144/0.7834, allocations: 0.8656 MB / 1.188 GB, free: 4.648 MB / 0.7136 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0003792/0.7838, allocations: 308 kB / 1.188 GB, free: 4.344 MB / 0.7136 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0005549/0.7843, allocations: 392 kB / 1.188 GB, free: 3.957 MB / 0.7136 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 7.915e-06/0.7843, allocations: 8 kB / 1.188 GB, free: 3.949 MB / 0.7136 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 2.312e-05/0.7844, allocations: 4 kB / 1.188 GB, free: 3.945 MB / 0.7136 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 8.977e-06/0.7844, allocations: 5.953 kB / 1.188 GB, free: 3.941 MB / 0.7136 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.004665/0.7891, allocations: 3.25 MB / 1.191 GB, free: 0.6289 MB / 0.7136 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.591e-06/0.7891, allocations: 4 kB / 1.191 GB, free: 0.625 MB / 0.7136 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0004764/0.7896, allocations: 111.9 kB / 1.192 GB, free: 0.5156 MB / 0.7136 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0005712/0.7901, allocations: 253.4 kB / 1.192 GB, free: 268 kB / 0.7136 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 6.25e-05/0.7902, allocations: 31.91 kB / 1.192 GB, free: 236 kB / 0.7136 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.003966/0.7942, allocations: 4.358 MB / 1.196 GB, free: 11.61 MB / 0.7292 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.302e-06/0.7942, allocations: 0 / 1.196 GB, free: 11.61 MB / 0.7292 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.003482/0.7977, allocations: 2.207 MB / 1.198 GB, free: 9.379 MB / 0.7292 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0006738/0.7984, allocations: 452.7 kB / 1.199 GB, free: 8.914 MB / 0.7292 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001951/0.7986, allocations: 24 kB / 1.199 GB, free: 8.891 MB / 0.7292 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.000615/0.7992, allocations: 81.72 kB / 1.199 GB, free: 8.812 MB / 0.7292 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.000201/0.7994, allocations: 92.86 kB / 1.199 GB, free: 8.723 MB / 0.7292 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 6.922e-05/0.7995, allocations: 39.97 kB / 1.199 GB, free: 8.684 MB / 0.7292 GB Notification: Performance of sorting global known variables: time 0.003893/0.8034, allocations: 3.73 MB / 1.203 GB, free: 4.969 MB / 0.7292 GB Notification: Performance of sort global known variables: time 2.2e-07/0.8034, allocations: 8 kB / 1.203 GB, free: 4.961 MB / 0.7292 GB Notification: Performance of remove unused functions: time 0.001163/0.8046, allocations: 367.4 kB / 1.203 GB, free: 4.602 MB / 0.7292 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 4 (thermalZoneTwoElements.extWallRC.thermCapExt[1].T,thermalZoneTwoElements.intWallRC.thermCapInt[1].T,assEqu.diff,mean.x) * Number of discrete variables: 26 ($whenCondition9,$whenCondition8,$whenCondition7,$whenCondition6,$whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,intGai.nextTimeEvent,intGai.nextTimeEventScaled,reference.nextTimeEvent,reference.nextTimeEventScaled,outdoorTemp.nextTimeEvent,outdoorTemp.nextTimeEventScaled,tableSolRadWindow.nextTimeEvent,tableSolRadWindow.nextTimeEventScaled,greaterThreshold1.y,greaterThreshold2.y,tableSolRadWall.nextTimeEvent,tableSolRadWall.nextTimeEventScaled,HSky.nextTimeEvent,HSky.nextTimeEventScaled,assEqu.satisfied,assEqu.nFai,mean.y) * Number of discrete states: 15 (intGai.nextTimeEvent,reference.nextTimeEvent,outdoorTemp.nextTimeEvent,tableSolRadWindow.nextTimeEvent,tableSolRadWall.nextTimeEvent,HSky.nextTimeEvent,mean.x,assEqu.satisfied,assEqu.nFai,HSky.nextTimeEventScaled,tableSolRadWall.nextTimeEventScaled,tableSolRadWindow.nextTimeEventScaled,outdoorTemp.nextTimeEventScaled,reference.nextTimeEventScaled,intGai.nextTimeEventScaled) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (79): * Single equations (assignments): 63 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 14 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 2 {(2,100.0%) 18,(1,100.0%) 3} * Non-linear torn systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.001015/0.8056, allocations: 0.5063 MB / 1.203 GB, free: 4.266 MB / 0.7292 GB Notification: Performance of simCode: created initialization part: time 0.002324/0.8079, allocations: 1.379 MB / 1.205 GB, free: 2.859 MB / 0.7292 GB Notification: Performance of simCode: created event and clocks part: time 2.495e-06/0.808, allocations: 0 / 1.205 GB, free: 2.859 MB / 0.7292 GB Notification: Performance of simCode: created simulation system equations: time 0.0012/0.8092, allocations: 0.8628 MB / 1.206 GB, free: 1.973 MB / 0.7292 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001824/0.811, allocations: 358.4 kB / 1.206 GB, free: 1.625 MB / 0.7292 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.007851/0.8189, allocations: 6.493 MB / 1.212 GB, free: 11.1 MB / 0.7448 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001467/0.8203, allocations: 1.952 MB / 1.214 GB, free: 9.113 MB / 0.7448 GB Notification: Performance of simCode: alias equations: time 0.0007255/0.8211, allocations: 236.5 kB / 1.214 GB, free: 8.879 MB / 0.7448 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.000224/0.8213, allocations: 95.41 kB / 1.214 GB, free: 8.785 MB / 0.7448 GB Notification: Performance of SimCode: time 7.52e-07/0.8213, allocations: 4 kB / 1.214 GB, free: 8.781 MB / 0.7448 GB Notification: Performance of Templates: time 0.03118/0.8525, allocations: 17.1 MB / 1.231 GB, free: 7.816 MB / 0.7605 GB make -j1 -f Buildings_maint.8.0.x_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9.makefile (rm -f Buildings_maint.8.0.x_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9.pipe ; mkfifo Buildings_maint.8.0.x_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9.pipe ; head -c 1048576 < Buildings_maint.8.0.x_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9.pipe >> ../files/Buildings_maint.8.0.x_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9.sim & ./Buildings_maint.8.0.x_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9 -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_maint.8.0.x_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9.pipe 2>&1)