Running: ./testmodel.py --libraries=/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8_Buildings.Electrical.AC.OnePhase.Conversion.Examples.ACACTransformerFull.conf.json
loadFile("/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Buildings 8.1.1-maint.8.1.x/package.mo", uses=false)
loadFile("/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo", uses=false)
loadFile("/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo", uses=false)
loadFile("/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo", uses=false)
Using package ModelicaServices with version 4.0.0 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo)
Using package Modelica with version 4.0.0 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo)
Using package Complex with version 4.0.0 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo)
Using package Buildings with version 8.1.1 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Buildings 8.1.1-maint.8.1.x/package.mo)
Running command: translateModel(Buildings.Electrical.AC.OnePhase.Conversion.Examples.ACACTransformerFull,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Electrical.AC.OnePhase.Conversion.Examples.ACACTransformerFull")
translateModel(Buildings.Electrical.AC.OnePhase.Conversion.Examples.ACACTransformerFull,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Electrical.AC.OnePhase.Conversion.Examples.ACACTransformerFull")
Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Buildings 8.1.1-maint.8.1.x/package.mo): time 1.936/1.936, allocations: 297.4 MB / 312.6 MB, free: 2.949 MB / 234.7 MB
Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001162/0.001162, allocations: 178 kB / 382.3 MB, free: 14.83 MB / 314.7 MB
Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.694/1.694, allocations: 225.7 MB / 0.6617 GB, free: 7.258 MB / 490.7 MB
Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001027/0.001027, allocations: 94.03 kB / 0.7789 GB, free: 46.85 MB / 0.5417 GB
Notification: Performance of FrontEnd - loaded program: time 0.0004028/0.0004028, allocations: 8 kB / 0.9058 GB, free: 4.949 MB / 0.6198 GB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.8747/0.8751, allocations: 119.2 MB / 1.022 GB, free: 57.68 MB / 0.698 GB
Notification: Performance of NFInst.instantiate(Buildings.Electrical.AC.OnePhase.Conversion.Examples.ACACTransformerFull): time 0.006575/0.8817, allocations: 4.779 MB / 1.027 GB, free: 54.85 MB / 0.698 GB
Notification: Performance of NFInst.instExpressions: time 0.007892/0.8897, allocations: 7.499 MB / 1.034 GB, free: 47.84 MB / 0.698 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.0009175/0.8907, allocations: 15.59 kB / 1.034 GB, free: 47.83 MB / 0.698 GB
Notification: Performance of NFTyping.typeComponents: time 0.000594/0.8913, allocations: 96.73 kB / 1.034 GB, free: 47.78 MB / 0.698 GB
Notification: Performance of NFTyping.typeBindings: time 0.002368/0.8937, allocations: 0.6194 MB / 1.035 GB, free: 47.46 MB / 0.698 GB
Notification: Performance of NFTyping.typeClassSections: time 0.001786/0.8955, allocations: 0.4984 MB / 1.035 GB, free: 47.21 MB / 0.698 GB
Notification: Performance of NFFlatten.flatten: time 0.002352/0.8979, allocations: 1.633 MB / 1.037 GB, free: 46.67 MB / 0.698 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.001487/0.8994, allocations: 0.9945 MB / 1.038 GB, free: 45.91 MB / 0.698 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.0008004/0.9002, allocations: 406.5 kB / 1.038 GB, free: 45.76 MB / 0.698 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.000868/0.9011, allocations: 0.519 MB / 1.039 GB, free: 45.57 MB / 0.698 GB
Notification: Performance of NFPackage.collectConstants: time 9.901e-05/0.9012, allocations: 39.62 kB / 1.039 GB, free: 45.56 MB / 0.698 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.002041/0.9032, allocations: 0.9706 MB / 1.04 GB, free: 45.24 MB / 0.698 GB
Notification: Performance of NFScalarize.scalarize: time 0.0003621/0.9036, allocations: 305.1 kB / 1.04 GB, free: 45.13 MB / 0.698 GB
Notification: Performance of NFVerifyModel.verify: time 0.0004644/0.9041, allocations: 409.2 kB / 1.041 GB, free: 44.89 MB / 0.698 GB
Notification: Performance of NFConvertDAE.convert: time 0.002038/0.9061, allocations: 1.41 MB / 1.042 GB, free: 44.48 MB / 0.698 GB
Notification: Performance of FrontEnd - DAE generated: time 8.306e-06/0.9061, allocations: 1.375 kB / 1.042 GB, free: 44.48 MB / 0.698 GB
Notification: Performance of FrontEnd: time 2.535e-06/0.9061, allocations: 0 / 1.042 GB, free: 44.48 MB / 0.698 GB
Notification: Performance of Transformations before backend: time 1.064e-05/0.9062, allocations: 0 / 1.042 GB, free: 44.48 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: 184
 * Number of variables: 184
Notification: Performance of Generate backend data structure: time 0.001862/0.908, allocations: 1.019 MB / 1.043 GB, free: 43.75 MB / 0.698 GB
Notification: Performance of prepare preOptimizeDAE: time 5.084e-05/0.9081, allocations: 9.25 kB / 1.043 GB, free: 43.75 MB / 0.698 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.00898/0.9171, allocations: 1.698 MB / 1.045 GB, free: 43.67 MB / 0.698 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.001339/0.9185, allocations: 0.62 MB / 1.045 GB, free: 43.27 MB / 0.698 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 4.926e-05/0.9185, allocations: 44.8 kB / 1.045 GB, free: 43.25 MB / 0.698 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001685/0.9187, allocations: 65.09 kB / 1.045 GB, free: 43.23 MB / 0.698 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.004554/0.9233, allocations: 1.911 MB / 1.047 GB, free: 42.62 MB / 0.698 GB
Notification: Performance of preOpt findStateOrder (simulation): time 2.578e-05/0.9233, allocations: 0 / 1.047 GB, free: 42.62 MB / 0.698 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001104/0.9234, allocations: 27.91 kB / 1.047 GB, free: 42.6 MB / 0.698 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0003352/0.9238, allocations: 157 kB / 1.047 GB, free: 42.59 MB / 0.698 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.006721/0.9305, allocations: 2.611 MB / 1.05 GB, free: 42.06 MB / 0.698 GB
Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.008755/0.9393, allocations: 6.666 MB / 1.056 GB, free: 37.59 MB / 0.698 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.0029/0.9422, allocations: 1.264 MB / 1.058 GB, free: 37.22 MB / 0.698 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.002157/0.9444, allocations: 0.9075 MB / 1.059 GB, free: 37 MB / 0.698 GB
Notification: Performance of preOpt evalFunc (simulation): time 0.001948/0.9464, allocations: 1.484 MB / 1.06 GB, free: 36.04 MB / 0.698 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.568e-05/0.9464, allocations: 41.88 kB / 1.06 GB, free: 36 MB / 0.698 GB
Notification: Performance of pre-optimization done (n=73): time 2.885e-06/0.9464, allocations: 0 / 1.06 GB, free: 36 MB / 0.698 GB
Notification: Performance of matching and sorting (n=107): time 0.02523/0.9717, allocations: 8.258 MB / 1.068 GB, free: 34.05 MB / 0.698 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 5.349e-05/0.9718, allocations: 91.36 kB / 1.068 GB, free: 33.95 MB / 0.698 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0007641/0.9726, allocations: 0.5778 MB / 1.069 GB, free: 33.69 MB / 0.698 GB
Notification: Performance of collectPreVariables (initialization): time 0.0001276/0.9727, allocations: 45.2 kB / 1.069 GB, free: 33.64 MB / 0.698 GB
Notification: Performance of collectInitialEqns (initialization): time 0.0002496/0.973, allocations: 411.5 kB / 1.069 GB, free: 33.3 MB / 0.698 GB
Notification: Performance of collectInitialBindings (initialization): time 0.0003439/0.9733, allocations: 370.8 kB / 1.07 GB, free: 33.02 MB / 0.698 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 9.666e-05/0.9734, allocations: 30.47 kB / 1.07 GB, free: 32.99 MB / 0.698 GB
Notification: Performance of setup shared object (initialization): time 0.0001389/0.9736, allocations: 388.3 kB / 1.07 GB, free: 32.65 MB / 0.698 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.002671/0.9762, allocations: 1.108 MB / 1.071 GB, free: 32.37 MB / 0.698 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.002696/0.9789, allocations: 1.448 MB / 1.072 GB, free: 31.68 MB / 0.698 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.00526/0.9842, allocations: 2.599 MB / 1.075 GB, free: 30.57 MB / 0.698 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 8.015e-06/0.9842, allocations: 3 kB / 1.075 GB, free: 30.57 MB / 0.698 GB
Notification: Performance of matching and sorting (n=163) (initialization): time 0.01038/0.9946, allocations: 3.883 MB / 1.079 GB, free: 29.52 MB / 0.698 GB
Notification: Performance of prepare postOptimizeDAE: time 0.0003254/0.995, allocations: 397.9 kB / 1.079 GB, free: 29.01 MB / 0.698 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.94e-05/0.995, allocations: 10.09 kB / 1.079 GB, free: 29.01 MB / 0.698 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.005105/1, allocations: 1.382 MB / 1.081 GB, free: 28.79 MB / 0.698 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.002093/1.002, allocations: 459.7 kB / 1.081 GB, free: 28.77 MB / 0.698 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01592/1.018, allocations: 11.22 MB / 1.092 GB, free: 21.45 MB / 0.698 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002654/1.021, allocations: 313.9 kB / 1.092 GB, free: 21.43 MB / 0.698 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.000204/1.021, allocations: 63.44 kB / 1.092 GB, free: 21.42 MB / 0.698 GB
Notification: Performance of prepare postOptimizeDAE: time 1.222e-05/1.021, allocations: 3.406 kB / 1.092 GB, free: 21.42 MB / 0.698 GB
Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.01034/1.032, allocations: 3.568 MB / 1.096 GB, free: 20.46 MB / 0.698 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.457e-05/1.032, allocations: 10.19 kB / 1.096 GB, free: 20.46 MB / 0.698 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.004297/1.036, allocations: 1.101 MB / 1.097 GB, free: 20.26 MB / 0.698 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.002503/1.038, allocations: 479.7 kB / 1.097 GB, free: 20.23 MB / 0.698 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01604/1.055, allocations: 10.34 MB / 1.107 GB, free: 13.21 MB / 0.698 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002765/1.057, allocations: 306.2 kB / 1.108 GB, free: 13.18 MB / 0.698 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002266/1.058, allocations: 66.31 kB / 1.108 GB, free: 13.17 MB / 0.698 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 46
 * 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 (123):
 * Single equations (assignments): 119
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (not torn): 0
 * Torn equation systems: 4
 * Mixed (continuous/discrete) equation systems: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems (#iteration vars, #inner vars, density): 3 systems
   {(2,8,100.0%), (2,8,100.0%), (3,9,100.0%)}
 * Non-linear torn systems (#iteration vars, #inner vars): 1 system
   {(3,9)}
Notification: Performance of prepare postOptimizeDAE: time 0.0008622/1.058, allocations: 378.2 kB / 1.108 GB, free: 12.89 MB / 0.698 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002372/1.059, allocations: 88.52 kB / 1.108 GB, free: 12.84 MB / 0.698 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0123/1.071, allocations: 3.763 MB / 1.112 GB, free: 11.79 MB / 0.698 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.594e-05/1.071, allocations: 11.34 kB / 1.112 GB, free: 11.79 MB / 0.698 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 3.783e-05/1.071, allocations: 6.062 kB / 1.112 GB, free: 11.79 MB / 0.698 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 3.077e-05/1.071, allocations: 9.531 kB / 1.112 GB, free: 11.79 MB / 0.698 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.01603/1.087, allocations: 5.485 MB / 1.117 GB, free: 9.785 MB / 0.698 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.352e-05/1.087, allocations: 5.469 kB / 1.117 GB, free: 9.785 MB / 0.698 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001775/1.089, allocations: 363.9 kB / 1.118 GB, free: 9.77 MB / 0.698 GB
Notification: Performance of postOpt tearingSystem (simulation): time 0.005487/1.095, allocations: 1.243 MB / 1.119 GB, free: 9.57 MB / 0.698 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0003381/1.095, allocations: 38.97 kB / 1.119 GB, free: 9.547 MB / 0.698 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.01597/1.111, allocations: 10.74 MB / 1.129 GB, free: 16.98 MB / 0.7136 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 9.287e-06/1.111, allocations: 4 kB / 1.129 GB, free: 16.97 MB / 0.7136 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.009512/1.121, allocations: 3.673 MB / 1.133 GB, free: 13.2 MB / 0.7136 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.001026/1.122, allocations: 335.9 kB / 1.133 GB, free: 12.85 MB / 0.7136 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001793/1.122, allocations: 28 kB / 1.133 GB, free: 12.82 MB / 0.7136 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001883/1.124, allocations: 319.5 kB / 1.134 GB, free: 12.51 MB / 0.7136 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0004936/1.124, allocations: 112.1 kB / 1.134 GB, free: 12.4 MB / 0.7136 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001202/1.124, allocations: 43.97 kB / 1.134 GB, free: 12.36 MB / 0.7136 GB
Notification: Performance of sorting global known variables: time 0.0006634/1.125, allocations: 402.8 kB / 1.134 GB, free: 11.97 MB / 0.7136 GB
Notification: Performance of sort global known variables: time 1.71e-07/1.125, allocations: 0 / 1.134 GB, free: 11.97 MB / 0.7136 GB
Notification: Performance of remove unused functions: time 0.003328/1.128, allocations: 0.5938 MB / 1.135 GB, free: 11.38 MB / 0.7136 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 24
 * 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 (68):
 * Single equations (assignments): 64
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (not torn): 0
 * Torn equation systems: 4
 * Mixed (continuous/discrete) equation systems: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems (#iteration vars, #inner vars, density): 3 systems
   {(3,9,100.0%), (2,8,100.0%), (2,8,100.0%)}
 * Non-linear torn systems (#iteration vars, #inner vars): 1 system
   {(3,9)}
Notification: Performance of Backend phase and start with SimCode phase: time 0.0003387/1.129, allocations: 143.1 kB / 1.135 GB, free: 11.22 MB / 0.7136 GB
Notification: Performance of simCode: created initialization part: time 0.01463/1.143, allocations: 5.718 MB / 1.14 GB, free: 5.406 MB / 0.7136 GB
Notification: Performance of simCode: created event and clocks part: time 2.021e-05/1.143, allocations: 8.125 kB / 1.14 GB, free: 5.398 MB / 0.7136 GB
Notification: Performance of simCode: created simulation system equations: time 0.00548/1.149, allocations: 2.114 MB / 1.143 GB, free: 3.234 MB / 0.7136 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001683/1.151, allocations: 156.3 kB / 1.143 GB, free: 3.082 MB / 0.7136 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01048/1.161, allocations: 3.897 MB / 1.146 GB, free: 15.09 MB / 0.7292 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0009606/1.162, allocations: 1.114 MB / 1.148 GB, free: 13.95 MB / 0.7292 GB
Notification: Performance of simCode: alias equations: time 0.002219/1.164, allocations: 0.5418 MB / 1.148 GB, free: 13.41 MB / 0.7292 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0003169/1.165, allocations: 79.38 kB / 1.148 GB, free: 13.33 MB / 0.7292 GB
Notification: Performance of SimCode: time 5.21e-07/1.165, allocations: 0 / 1.148 GB, free: 13.33 MB / 0.7292 GB
Notification: Performance of Templates: time 0.04468/1.209, allocations: 26.51 MB / 1.174 GB, free: 2.898 MB / 0.7448 GB
make -j1 -f Buildings_8_Buildings.Electrical.AC.OnePhase.Conversion.Examples.ACACTransformerFull.makefile
(rm -f Buildings_8_Buildings.Electrical.AC.OnePhase.Conversion.Examples.ACACTransformerFull.pipe ; mkfifo Buildings_8_Buildings.Electrical.AC.OnePhase.Conversion.Examples.ACACTransformerFull.pipe ; head -c 1048576 < Buildings_8_Buildings.Electrical.AC.OnePhase.Conversion.Examples.ACACTransformerFull.pipe >> ../files/Buildings_8_Buildings.Electrical.AC.OnePhase.Conversion.Examples.ACACTransformerFull.sim & ./Buildings_8_Buildings.Electrical.AC.OnePhase.Conversion.Examples.ACACTransformerFull -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_8_Buildings.Electrical.AC.OnePhase.Conversion.Examples.ACACTransformerFull.pipe 2>&1)