Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_maint.7.0.x_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7.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)
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo", uses=false)
Using package Buildings with version 7.0.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/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 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(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7,tolerance=1e-06,outputFormat="empty",numberOfIntervals=172800,variableFilter="",fileNamePrefix="Buildings_maint.7.0.x_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7")
translateModel(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7,tolerance=1e-06,outputFormat="empty",numberOfIntervals=172800,variableFilter="",fileNamePrefix="Buildings_maint.7.0.x_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7")
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.0008989/0.0008989, allocations: 111.3 kB / 15.23 MB, free: 0.6602 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.0009217/0.0009218, allocations: 198.8 kB / 16.14 MB, free: 6.656 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.198/1.198, allocations: 205.1 MB / 222 MB, free: 4.746 MB / 174.1 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo): time 1.317/1.317, allocations: 251.6 MB / 0.5088 GB, free: 3.293 MB / 414.1 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 0.00119/0.00119, allocations: 63.91 kB / 0.6216 GB, free: 1.953 MB / 0.5137 GB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.3587/0.3599, allocations: 104.7 MB / 0.7238 GB, free: 13.16 MB / 0.545 GB
Notification: Performance of NFInst.instantiate(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7): time 0.1321/0.4921, allocations: 155.6 MB / 0.8757 GB, free: 0.9883 MB / 0.6856 GB
Notification: Performance of NFInst.instExpressions: time 0.02/0.5121, allocations: 21.8 MB / 0.897 GB, free: 11.12 MB / 0.7169 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.00159/0.5138, allocations: 51.69 kB / 0.8971 GB, free: 11.07 MB / 0.7169 GB
Notification: Performance of NFTyping.typeComponents: time 0.001436/0.5153, allocations: 1.337 MB / 0.8984 GB, free: 9.734 MB / 0.7169 GB
Notification: Performance of NFTyping.typeBindings: time 0.001149/0.5164, allocations: 0.9694 MB / 0.8993 GB, free: 8.762 MB / 0.7169 GB
Notification: Performance of NFTyping.typeClassSections: time 0.001067/0.5175, allocations: 0.5414 MB / 0.8998 GB, free: 8.227 MB / 0.7169 GB
Notification: Performance of NFFlatten.flatten: time 0.00119/0.5187, allocations: 1.758 MB / 0.9016 GB, free: 6.465 MB / 0.7169 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.0007633/0.5195, allocations: 0.8768 MB / 0.9024 GB, free: 5.566 MB / 0.7169 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.0005387/0.52, allocations: 0.6577 MB / 0.9031 GB, free: 4.906 MB / 0.7169 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.0009219/0.5209, allocations: 1.183 MB / 0.9042 GB, free: 3.719 MB / 0.7169 GB
Notification: Performance of NFPackage.collectConstants: time 0.0001048/0.5211, allocations: 52 kB / 0.9043 GB, free: 3.668 MB / 0.7169 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.0002182/0.5213, allocations: 95.98 kB / 0.9044 GB, free: 3.574 MB / 0.7169 GB
Notification: Performance of NFScalarize.scalarize: time 0.0002612/0.5215, allocations: 400.3 kB / 0.9047 GB, free: 3.184 MB / 0.7169 GB
Notification: Performance of NFVerifyModel.verify: time 0.0004/0.522, allocations: 0.6129 MB / 0.9053 GB, free: 2.566 MB / 0.7169 GB
Notification: Performance of NFConvertDAE.convert: time 0.0009463/0.5229, allocations: 1.526 MB / 0.9068 GB, free: 1.035 MB / 0.7169 GB
Notification: Performance of FrontEnd - DAE generated: time 3.577e-06/0.5229, allocations: 0 / 0.9068 GB, free: 1.035 MB / 0.7169 GB
Notification: Performance of FrontEnd: time 8.91e-07/0.5229, allocations: 0 / 0.9068 GB, free: 1.035 MB / 0.7169 GB
Notification: Performance of Transformations before backend: time 9.608e-06/0.5229, allocations: 3.938 kB / 0.9068 GB, free: 1.031 MB / 0.7169 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 156
 * Number of variables: 156
Notification: Performance of Generate backend data structure: time 0.3091/0.832, allocations: 1.898 MB / 0.9087 GB, free: 185.3 MB / 0.7169 GB
Notification: Performance of prepare preOptimizeDAE: time 4.155e-05/0.8321, allocations: 9.688 kB / 0.9087 GB, free: 185.3 MB / 0.7169 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0003002/0.8324, allocations: 186.7 kB / 0.9089 GB, free: 185.2 MB / 0.7169 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.001101/0.8335, allocations: 0.869 MB / 0.9097 GB, free: 184.7 MB / 0.7169 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001214/0.8336, allocations: 89.09 kB / 0.9098 GB, free: 184.6 MB / 0.7169 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 9.895e-05/0.8337, allocations: 65.34 kB / 0.9099 GB, free: 184.6 MB / 0.7169 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.001209/0.8349, allocations: 0.7193 MB / 0.9106 GB, free: 184.3 MB / 0.7169 GB
Notification: Performance of preOpt findStateOrder (simulation): time 2.087e-05/0.835, allocations: 5.375 kB / 0.9106 GB, free: 184.3 MB / 0.7169 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 5.461e-05/0.835, allocations: 28.92 kB / 0.9106 GB, free: 184.3 MB / 0.7169 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.503e-05/0.835, allocations: 19.41 kB / 0.9106 GB, free: 184.3 MB / 0.7169 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001102/0.8362, allocations: 0.5374 MB / 0.9111 GB, free: 184.1 MB / 0.7169 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 0.003983/0.8401, allocations: 3.618 MB / 0.9147 GB, free: 181.6 MB / 0.7169 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.001268/0.8414, allocations: 0.6071 MB / 0.9153 GB, free: 181.3 MB / 0.7169 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.0006812/0.8421, allocations: 377.5 kB / 0.9156 GB, free: 181.2 MB / 0.7169 GB
Notification: Performance of preOpt evalFunc (simulation): time 4.511e-05/0.8422, allocations: 7.375 kB / 0.9156 GB, free: 181.2 MB / 0.7169 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.00071/0.8429, allocations: 374.5 kB / 0.916 GB, free: 181.1 MB / 0.7169 GB
Notification: Performance of pre-optimization done (n=65): time 2.224e-06/0.8429, allocations: 3.938 kB / 0.916 GB, free: 181.1 MB / 0.7169 GB
Notification: Performance of matching and sorting (n=65): time 0.004665/0.8476, allocations: 1.784 MB / 0.9177 GB, free: 180.4 MB / 0.7169 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 3.354e-05/0.8476, allocations: 60.16 kB / 0.9178 GB, free: 180.3 MB / 0.7169 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002639/0.8503, allocations: 2.25 MB / 0.92 GB, free: 179.6 MB / 0.7169 GB
Notification: Performance of collectPreVariables (initialization): time 4.254e-05/0.8503, allocations: 50.19 kB / 0.92 GB, free: 179.5 MB / 0.7169 GB
Notification: Performance of collectInitialEqns (initialization): time 0.0003831/0.8507, allocations: 0.7175 MB / 0.9207 GB, free: 178.9 MB / 0.7169 GB
Notification: Performance of collectInitialBindings (initialization): time 0.0001096/0.8508, allocations: 207.7 kB / 0.9209 GB, free: 178.7 MB / 0.7169 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001573/0.851, allocations: 128.8 kB / 0.9211 GB, free: 178.7 MB / 0.7169 GB
Notification: Performance of setup shared object (initialization): time 5.073e-05/0.851, allocations: 336.8 kB / 0.9214 GB, free: 178.3 MB / 0.7169 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.0005364/0.8516, allocations: 284.8 kB / 0.9217 GB, free: 178.2 MB / 0.7169 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.0005611/0.8522, allocations: 423.1 kB / 0.9221 GB, free: 177.9 MB / 0.7169 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.001022/0.8532, allocations: 0.6721 MB / 0.9227 GB, free: 177.5 MB / 0.7169 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.779e-06/0.8532, allocations: 1.031 kB / 0.9227 GB, free: 177.5 MB / 0.7169 GB
Notification: Performance of matching and sorting (n=93) (initialization): time 0.001926/0.8551, allocations: 1.114 MB / 0.9238 GB, free: 176.9 MB / 0.7169 GB
Notification: Performance of prepare postOptimizeDAE: time 1.508e-05/0.8552, allocations: 3.938 kB / 0.9238 GB, free: 176.9 MB / 0.7169 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 7.544e-06/0.8552, allocations: 3.938 kB / 0.9238 GB, free: 176.9 MB / 0.7169 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.000689/0.8559, allocations: 270.7 kB / 0.9241 GB, free: 176.8 MB / 0.7169 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003508/0.8562, allocations: 122.7 kB / 0.9242 GB, free: 176.8 MB / 0.7169 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.003664/0.8599, allocations: 3.452 MB / 0.9276 GB, free: 173.8 MB / 0.7169 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004881/0.8604, allocations: 91.33 kB / 0.9276 GB, free: 173.7 MB / 0.7169 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.795e-05/0.8604, allocations: 27.98 kB / 0.9277 GB, free: 173.6 MB / 0.7169 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 17
 * Number of states: 0 ()
 * Number of discrete variables: 25 (assEqu.nFai,$PRE.assEqu.nFai,$whenCondition6,$PRE.intGai.nextTimeEvent,$whenCondition5,$PRE.reference.nextTimeEvent,$whenCondition4,$PRE.setTemp.nextTimeEvent,$whenCondition3,$whenCondition1,mean.y,$PRE.mean.y,assEqu.satisfied,$PRE.assEqu.satisfied,reference.nextTimeEventScaled,$PRE.reference.nextTimeEventScaled,reference.nextTimeEvent,$whenCondition2,setTemp.nextTimeEventScaled,$PRE.setTemp.nextTimeEventScaled,setTemp.nextTimeEvent,intGai.nextTimeEventScaled,$PRE.intGai.nextTimeEventScaled,intGai.nextTimeEvent,conHeaCoo.I.trigger_internal)
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for initialization (67):
 * Single equations (assignments): 66
 * 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
   {(2,25)}
Notification: Performance of prepare postOptimizeDAE: time 0.0003889/0.8608, allocations: 461.5 kB / 0.9281 GB, free: 173.2 MB / 0.7169 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001216/0.861, allocations: 161.9 kB / 0.9283 GB, free: 173 MB / 0.7169 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0001939/0.8612, allocations: 187.5 kB / 0.9284 GB, free: 172.8 MB / 0.7169 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 3.817e-06/0.8612, allocations: 7.938 kB / 0.9285 GB, free: 172.8 MB / 0.7169 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 7.794e-06/0.8612, allocations: 3.984 kB / 0.9285 GB, free: 172.8 MB / 0.7169 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 5.821e-06/0.8612, allocations: 4 kB / 0.9285 GB, free: 172.8 MB / 0.7169 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002594/0.8638, allocations: 2.029 MB / 0.9304 GB, free: 170.7 MB / 0.7169 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.855e-06/0.8638, allocations: 0 / 0.9304 GB, free: 170.7 MB / 0.7169 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002365/0.864, allocations: 63.89 kB / 0.9305 GB, free: 170.7 MB / 0.7169 GB
Notification: Performance of postOpt tearingSystem (simulation): time 0.0006045/0.8647, allocations: 273.1 kB / 0.9308 GB, free: 170.4 MB / 0.7169 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.801e-05/0.8647, allocations: 15.98 kB / 0.9308 GB, free: 170.4 MB / 0.7169 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.003886/0.8686, allocations: 4.778 MB / 0.9354 GB, free: 165.3 MB / 0.7169 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.262e-06/0.8686, allocations: 0 / 0.9354 GB, free: 165.3 MB / 0.7169 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.00196/0.8706, allocations: 1.396 MB / 0.9368 GB, free: 163.9 MB / 0.7169 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.0002166/0.8708, allocations: 263 kB / 0.9371 GB, free: 163.7 MB / 0.7169 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001108/0.8709, allocations: 20 kB / 0.9371 GB, free: 163.6 MB / 0.7169 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0003817/0.8713, allocations: 47.86 kB / 0.9371 GB, free: 163.6 MB / 0.7169 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001258/0.8715, allocations: 72.33 kB / 0.9372 GB, free: 163.5 MB / 0.7169 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.997e-05/0.8715, allocations: 23.98 kB / 0.9372 GB, free: 163.5 MB / 0.7169 GB
Notification: Performance of sorting global known variables: time 0.001109/0.8726, allocations: 1.627 MB / 0.9388 GB, free: 161.9 MB / 0.7169 GB
Notification: Performance of sort global known variables: time 1.51e-07/0.8726, allocations: 0 / 0.9388 GB, free: 161.9 MB / 0.7169 GB
Notification: Performance of remove unused functions: time 0.0007213/0.8733, allocations: 281.3 kB / 0.9391 GB, free: 161.6 MB / 0.7169 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 1
 * Number of states: 5 (thermalZoneTwoElements.extWallRC.thermCapExt[1].T,thermalZoneTwoElements.intWallRC.thermCapInt[1].T,conHeaCoo.I.y,assEqu.diff,mean.x)
 * Number of discrete variables: 15 ($whenCondition6,$whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,intGai.nextTimeEvent,intGai.nextTimeEventScaled,reference.nextTimeEvent,reference.nextTimeEventScaled,setTemp.nextTimeEvent,setTemp.nextTimeEventScaled,assEqu.satisfied,assEqu.nFai,mean.y)
 * Number of discrete states: 9 (intGai.nextTimeEvent,reference.nextTimeEvent,setTemp.nextTimeEvent,mean.x,assEqu.satisfied,assEqu.nFai,setTemp.nextTimeEventScaled,reference.nextTimeEventScaled,intGai.nextTimeEventScaled)
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for simulation (39):
 * Single equations (assignments): 29
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 8
 * If-equations: 0
 * Equation systems (not torn): 0
 * Torn equation systems: 2
 * Mixed (continuous/discrete) equation systems: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems (#iteration vars, #inner vars, density): 1 system
   {(1,3,100.0%)}
 * Non-linear torn systems (#iteration vars, #inner vars): 1 system
   {(2,22)}
Notification: Performance of Backend phase and start with SimCode phase: time 0.0009151/0.8743, allocations: 484.5 kB / 0.9395 GB, free: 161.3 MB / 0.7169 GB
Notification: Performance of simCode: created initialization part: time 0.001363/0.8756, allocations: 0.907 MB / 0.9404 GB, free: 160.4 MB / 0.7169 GB
Notification: Performance of simCode: created event and clocks part: time 2.244e-06/0.8757, allocations: 0 / 0.9404 GB, free: 160.4 MB / 0.7169 GB
Notification: Performance of simCode: created simulation system equations: time 0.0007984/0.8765, allocations: 0.667 MB / 0.9411 GB, free: 159.7 MB / 0.7169 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001068/0.8775, allocations: 262.1 kB / 0.9413 GB, free: 159.5 MB / 0.7169 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.003549/0.8811, allocations: 3.554 MB / 0.9448 GB, free: 155.9 MB / 0.7169 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0006479/0.8818, allocations: 1.317 MB / 0.9461 GB, free: 154.5 MB / 0.7169 GB
Notification: Performance of simCode: alias equations: time 0.0002963/0.8821, allocations: 110.4 kB / 0.9462 GB, free: 154.4 MB / 0.7169 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001226/0.8822, allocations: 63.36 kB / 0.9462 GB, free: 154.4 MB / 0.7169 GB
Notification: Performance of SimCode: time 3e-07/0.8822, allocations: 0 / 0.9462 GB, free: 154.4 MB / 0.7169 GB
Notification: Performance of Templates: time 0.018/0.9002, allocations: 14.05 MB / 0.96 GB, free: 140.5 MB / 0.7169 GB
make -j1 -f Buildings_maint.7.0.x_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7.makefile
(rm -f Buildings_maint.7.0.x_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7.pipe ; mkfifo Buildings_maint.7.0.x_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7.pipe ; head -c 1048576 < Buildings_maint.7.0.x_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7.pipe >> ../files/Buildings_maint.7.0.x_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7.sim & ./Buildings_maint.7.0.x_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7  -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_maint.7.0.x_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7.pipe 2>&1)