Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Modelica_3.1_Modelica.Mechanics.MultiBody.Examples.Loops.PlanarLoops_analytic.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.Mechanics.MultiBody.Examples.Loops.PlanarLoops_analytic,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Modelica_3.1_Modelica.Mechanics.MultiBody.Examples.Loops.PlanarLoops_analytic") translateModel(Modelica.Mechanics.MultiBody.Examples.Loops.PlanarLoops_analytic,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Modelica_3.1_Modelica.Mechanics.MultiBody.Examples.Loops.PlanarLoops_analytic") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001487/0.001487, 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 0.001293/0.001293, allocations: 192.5 kB / 16.13 MB, free: 6.672 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.628/1.628, allocations: 205.1 MB / 222 MB, free: 4.738 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 0.001555/0.001555, allocations: 47.94 kB / 278.1 MB, free: 12.77 MB / 238.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3078/0.3093, allocations: 46.63 MB / 324.7 MB, free: 1.926 MB / 254.1 MB Notification: Performance of NFInst.instantiate(Modelica.Mechanics.MultiBody.Examples.Loops.PlanarLoops_analytic): time 0.1028/0.4122, allocations: 110.6 MB / 435.2 MB, free: 5.203 MB / 366.1 MB Notification: Performance of NFInst.instExpressions: time 0.3857/0.798, allocations: 22.25 MB / 457.5 MB, free: 440 kB / 382.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.034/0.8321, allocations: 483.6 kB / 458 MB, free: 440 kB / 382.1 MB Notification: Performance of NFTyping.typeComponents: time 0.0215/0.8536, allocations: 11.18 MB / 469.1 MB, free: 172 kB / 382.1 MB Notification: Performance of NFTyping.typeBindings: time 0.01219/0.8659, allocations: 3.411 MB / 472.5 MB, free: 15.95 MB / 398.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.006595/0.8725, allocations: 2.375 MB / 474.9 MB, free: 15.9 MB / 398.1 MB Notification: Performance of NFFlatten.flatten: time 0.02652/0.899, allocations: 15.34 MB / 490.3 MB, free: 14.05 MB / 398.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.02727/0.9264, allocations: 15.22 MB / 0.4936 GB, free: 7.727 MB / 398.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.01342/0.9398, allocations: 4.529 MB / 0.4981 GB, free: 3.984 MB / 398.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.0168/0.9567, allocations: 7.03 MB / 0.5049 GB, free: 13.62 MB / 414.1 MB Notification: Performance of NFPackage.collectConstants: time 0.006062/0.9628, allocations: 0.9023 MB / 0.5058 GB, free: 12.71 MB / 414.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.0104/0.9732, allocations: 2.282 MB / 0.508 GB, free: 10.55 MB / 414.1 MB Notification: Performance of NFScalarize.scalarize: time 0.01211/0.9854, allocations: 5.504 MB / 0.5134 GB, free: 5.082 MB / 414.1 MB Notification: Performance of NFVerifyModel.verify: time 0.02/1.005, allocations: 6.326 MB / 0.5196 GB, free: 14.77 MB / 430.1 MB Notification: Performance of NFConvertDAE.convert: time 0.03659/1.042, allocations: 22.12 MB / 0.5412 GB, free: 9.074 MB / 446.1 MB Notification: Performance of FrontEnd - DAE generated: time 9.087e-06/1.042, allocations: 4 kB / 0.5412 GB, free: 9.07 MB / 446.1 MB Notification: Performance of FrontEnd: time 2.224e-06/1.042, allocations: 0 / 0.5412 GB, free: 9.07 MB / 446.1 MB Notification: Performance of Transformations before backend: time 0.001599/1.044, allocations: 0 / 0.5412 GB, free: 9.07 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: 4012 * Number of variables: 4012 Notification: Performance of Generate backend data structure: time 0.06086/1.105, allocations: 13.99 MB / 0.5548 GB, free: 11.2 MB / 462.1 MB Notification: Performance of prepare preOptimizeDAE: time 6.017e-05/1.105, allocations: 8.031 kB / 0.5549 GB, free: 11.2 MB / 462.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0167/1.121, allocations: 3.055 MB / 0.5578 GB, free: 8.121 MB / 462.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.02094/1.142, allocations: 7.059 MB / 0.5647 GB, free: 1.434 MB / 462.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.001129/1.144, allocations: 0.7388 MB / 0.5655 GB, free: 0.7656 MB / 462.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.007322/1.151, allocations: 1.106 MB / 0.5665 GB, free: 15.74 MB / 478.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.09926/1.25, allocations: 33.89 MB / 0.5996 GB, free: 12.9 MB / 0.4981 GB Notification: Performance of preOpt findStateOrder (simulation): time 0.0007395/1.251, allocations: 76.03 kB / 0.5997 GB, free: 12.86 MB / 0.4981 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.006445/1.258, allocations: 457 kB / 0.6001 GB, free: 12.49 MB / 0.4981 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.008491/1.266, allocations: 4.552 MB / 0.6046 GB, free: 7.996 MB / 0.4981 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.5114/1.778, allocations: 31.96 MB / 0.6358 GB, free: 224.4 MB / 0.5138 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.1656/1.943, allocations: 114.2 MB / 0.7473 GB, free: 122.1 MB / 0.5138 GB Notification: Performance of preOpt comSubExp (simulation): time 0.05049/1.994, allocations: 18.7 MB / 0.7656 GB, free: 103.2 MB / 0.5138 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.01209/2.006, allocations: 10.03 MB / 0.7754 GB, free: 93.22 MB / 0.5138 GB Notification: Performance of preOpt evalFunc (simulation): time 0.05075/2.057, allocations: 32.25 MB / 0.8069 GB, free: 60.02 MB / 0.5138 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0001478/2.057, allocations: 86.16 kB / 0.8069 GB, free: 59.93 MB / 0.5138 GB Notification: Performance of pre-optimization done (n=512): time 1.423e-05/2.057, allocations: 0 / 0.8069 GB, free: 59.93 MB / 0.5138 GB Notification: Performance of matching and sorting (n=773): time 0.8241/2.881, allocations: 165.8 MB / 0.9689 GB, free: 143.5 MB / 0.5138 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001014/2.881, allocations: 206.2 kB / 0.9691 GB, free: 143.3 MB / 0.5138 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.01509/2.896, allocations: 7.991 MB / 0.9769 GB, free: 135.3 MB / 0.5138 GB Notification: Performance of collectPreVariables (initialization): time 0.002609/2.899, allocations: 149.6 kB / 0.977 GB, free: 135.2 MB / 0.5138 GB Notification: Performance of collectInitialEqns (initialization): time 0.00516/2.904, allocations: 6.934 MB / 0.9838 GB, free: 128.2 MB / 0.5138 GB Notification: Performance of collectInitialBindings (initialization): time 0.008795/2.913, allocations: 2.738 MB / 0.9865 GB, free: 125.5 MB / 0.5138 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.01733/2.93, allocations: 3.031 MB / 0.9894 GB, free: 122.5 MB / 0.5138 GB Notification: Performance of setup shared object (initialization): time 5.449e-05/2.93, allocations: 309.1 kB / 0.9897 GB, free: 122.2 MB / 0.5138 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.01557/2.946, allocations: 11.22 MB / 1.001 GB, free: 110.9 MB / 0.5138 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.02119/2.967, allocations: 17.78 MB / 1.018 GB, free: 90.11 MB / 0.5138 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.03694/3.004, allocations: 30.22 MB / 1.048 GB, free: 56.75 MB / 0.5138 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 0.0002527/3.004, allocations: 64 kB / 1.048 GB, free: 56.69 MB / 0.5138 GB Notification: Performance of matching and sorting (n=1941) (initialization): time 0.3213/3.326, allocations: 29.52 MB / 1.076 GB, free: 190.9 MB / 0.5138 GB Notification: Performance of prepare postOptimizeDAE: time 0.0001456/3.326, allocations: 102.2 kB / 1.077 GB, free: 190.9 MB / 0.5138 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.0002775/3.326, allocations: 216.8 kB / 1.077 GB, free: 190.9 MB / 0.5138 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0002582/3.326, allocations: 312.3 kB / 1.077 GB, free: 190.9 MB / 0.5138 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.02205/3.349, allocations: 4.586 MB / 1.082 GB, free: 190.8 MB / 0.5138 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0005105/3.349, allocations: 452.2 kB / 1.082 GB, free: 190.8 MB / 0.5138 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.01504/3.364, allocations: 1.182 MB / 1.083 GB, free: 190.5 MB / 0.5138 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.004134/3.368, allocations: 0.7421 MB / 1.084 GB, free: 190.4 MB / 0.5138 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 1004 * Number of states: 0 () * Number of discrete variables: 102 (body3.sphereColor[3],body3.sphereColor[2],body3.sphereColor[1],body3.cylinderColor[3],body3.cylinderColor[2],body3.cylinderColor[1],rod4.color[3],rod4.color[2],rod4.color[1],jointRRR3.rodColor[3],jointRRR3.rodColor[2],jointRRR3.rodColor[1],jointRRR3.cylinderColor[3],jointRRR3.cylinderColor[2],jointRRR3.cylinderColor[1],jointRRR3.jointUSR.rod1Color[3],jointRRR3.jointUSR.rod1Color[2],jointRRR3.jointUSR.rod1Color[1],jointRRR3.jointUSR.cylinderColor[3],jointRRR3.jointUSR.cylinderColor[2],jointRRR3.jointUSR.cylinderColor[1],jointRRR3.jointUSR.sphereColor[3],jointRRR3.jointUSR.sphereColor[2],jointRRR3.jointUSR.sphereColor[1],jointRRR3.jointUSR.revoluteColor[3],jointRRR3.jointUSR.revoluteColor[2],jointRRR3.jointUSR.revoluteColor[1],body2.sphereColor[3],body2.sphereColor[2],body2.sphereColor[1],body2.cylinderColor[3],body2.cylinderColor[2],body2.cylinderColor[1],rod3.color[3],rod3.color[2],rod3.color[1],jointRRR2.rodColor[3],jointRRR2.rodColor[2],jointRRR2.rodColor[1],jointRRR2.cylinderColor[3],jointRRR2.cylinderColor[2],jointRRR2.cylinderColor[1],jointRRR2.jointUSR.rod1Color[3],jointRRR2.jointUSR.rod1Color[2],jointRRR2.jointUSR.rod1Color[1],jointRRR2.jointUSR.cylinderColor[3],jointRRR2.jointUSR.cylinderColor[2],jointRRR2.jointUSR.cylinderColor[1],jointRRR2.jointUSR.sphereColor[3],jointRRR2.jointUSR.sphereColor[2],jointRRR2.jointUSR.sphereColor[1],jointRRR2.jointUSR.revoluteColor[3],jointRRR2.jointUSR.revoluteColor[2],jointRRR2.jointUSR.revoluteColor[1],body1.sphereColor[3],body1.sphereColor[2],body1.sphereColor[1],body1.cylinderColor[3],body1.cylinderColor[2],body1.cylinderColor[1],rod2.color[3],rod2.color[2],rod2.color[1],rod1.color[3],rod1.color[2],rod1.color[1],rev.cylinderColor[3],rev.cylinderColor[2],rev.cylinderColor[1],jointRRR1.rodColor[3],jointRRR1.rodColor[2],jointRRR1.rodColor[1],jointRRR1.cylinderColor[3],jointRRR1.cylinderColor[2],jointRRR1.cylinderColor[1],jointRRR3.jointUSR.revolute.positiveBranch,jointRRR2.jointUSR.revolute.positiveBranch,jointRRR1.jointUSR.revolute.positiveBranch,jointRRR1.jointUSR.rod1Color[3],jointRRR1.jointUSR.rod1Color[2],jointRRR1.jointUSR.rod1Color[1],jointRRR1.jointUSR.cylinderColor[3],jointRRR1.jointUSR.cylinderColor[2],jointRRR1.jointUSR.cylinderColor[1],jointRRR1.jointUSR.sphereColor[3],jointRRR1.jointUSR.sphereColor[2],jointRRR1.jointUSR.sphereColor[1],jointRRR1.jointUSR.revoluteColor[3],jointRRR1.jointUSR.revoluteColor[2],jointRRR1.jointUSR.revoluteColor[1],world.gravityArrowColor[3],world.gravityArrowColor[2],world.gravityArrowColor[1],world.axisColor_x[3],world.axisColor_x[2],world.axisColor_x[1],world.groundColor[3],world.groundColor[2],world.groundColor[1],world.gravitySphereColor[3],world.gravitySphereColor[2],world.gravitySphereColor[1]) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (1905): * Single equations (assignments): 1896 * Array equations: 9 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.01433/3.383, allocations: 5.498 MB / 1.089 GB, free: 188.1 MB / 0.5138 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.002388/3.385, allocations: 0.802 MB / 1.09 GB, free: 188.1 MB / 0.5138 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.03607/3.421, allocations: 21.36 MB / 1.111 GB, free: 178.3 MB / 0.5138 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 8.976e-05/3.421, allocations: 76.66 kB / 1.111 GB, free: 178.3 MB / 0.5138 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.229e-05/3.421, allocations: 3.875 kB / 1.111 GB, free: 178.3 MB / 0.5138 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.0001548/3.421, allocations: 37.5 kB / 1.111 GB, free: 178.3 MB / 0.5138 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.08388/3.505, allocations: 45.92 MB / 1.156 GB, free: 142 MB / 0.5138 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 7.616e-05/3.505, allocations: 8 kB / 1.156 GB, free: 142 MB / 0.5138 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.01474/3.52, allocations: 2.512 MB / 1.158 GB, free: 139.6 MB / 0.5138 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0001278/3.52, allocations: 32 kB / 1.158 GB, free: 139.5 MB / 0.5138 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.002783/3.523, allocations: 132 kB / 1.158 GB, free: 139.4 MB / 0.5138 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 9.842e-05/3.523, allocations: 38.89 kB / 1.158 GB, free: 139.4 MB / 0.5138 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 7.574e-06/3.523, allocations: 11 kB / 1.158 GB, free: 139.3 MB / 0.5138 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0497/3.573, allocations: 35.75 MB / 1.193 GB, free: 103.8 MB / 0.5138 GB Notification: Performance of postOpt removeConstants (simulation): time 0.008801/3.582, allocations: 2.891 MB / 1.196 GB, free: 101.3 MB / 0.5138 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.005545/3.587, allocations: 128 kB / 1.196 GB, free: 101.2 MB / 0.5138 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.011/3.598, allocations: 0.7761 MB / 1.197 GB, free: 100.4 MB / 0.5138 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.003578/3.602, allocations: 421.8 kB / 1.197 GB, free: 100 MB / 0.5138 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.002601/3.605, allocations: 192 kB / 1.198 GB, free: 99.85 MB / 0.5138 GB Notification: Performance of sorting global known variables: time 0.01067/3.615, allocations: 5.006 MB / 1.203 GB, free: 94.89 MB / 0.5138 GB Notification: Performance of sort global known variables: time 6.91e-07/3.615, allocations: 0 / 1.203 GB, free: 94.89 MB / 0.5138 GB Notification: Performance of remove unused functions: time 0.01709/3.633, allocations: 3.285 MB / 1.206 GB, free: 91.62 MB / 0.5138 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 30 * Number of states: 2 (rev.phi,rev.w) * 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 (757): * Single equations (assignments): 754 * Array equations: 3 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.003269/3.636, allocations: 445.3 kB / 1.206 GB, free: 91.28 MB / 0.5138 GB Notification: Performance of simCode: created initialization part: time 0.03833/3.674, allocations: 25 MB / 1.231 GB, free: 66.43 MB / 0.5138 GB Notification: Performance of simCode: created event and clocks part: time 1.849e-05/3.674, allocations: 6.25 kB / 1.231 GB, free: 66.42 MB / 0.5138 GB Notification: Performance of simCode: created simulation system equations: time 0.01621/3.69, allocations: 10.65 MB / 1.241 GB, free: 55.77 MB / 0.5138 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.01286/3.703, allocations: 0.9634 MB / 1.242 GB, free: 54.82 MB / 0.5138 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.3257/4.029, allocations: 40.24 MB / 1.281 GB, free: 190.4 MB / 0.5138 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.02244/4.052, allocations: 8.108 MB / 1.289 GB, free: 189.1 MB / 0.5138 GB Notification: Performance of simCode: alias equations: time 0.02286/4.074, allocations: 5.265 MB / 1.294 GB, free: 189 MB / 0.5138 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.008109/4.083, allocations: 0.6115 MB / 1.295 GB, free: 188.9 MB / 0.5138 GB Notification: Performance of SimCode: time 1.312e-06/4.083, allocations: 4 kB / 1.295 GB, free: 188.9 MB / 0.5138 GB Notification: Performance of Templates: time 0.1945/4.277, allocations: 132.1 MB / 1.424 GB, free: 67.44 MB / 0.5138 GB make -j1 -f Modelica_3.1_Modelica.Mechanics.MultiBody.Examples.Loops.PlanarLoops_analytic.makefile (rm -f Modelica_3.1_Modelica.Mechanics.MultiBody.Examples.Loops.PlanarLoops_analytic.pipe ; mkfifo Modelica_3.1_Modelica.Mechanics.MultiBody.Examples.Loops.PlanarLoops_analytic.pipe ; head -c 1048576 < Modelica_3.1_Modelica.Mechanics.MultiBody.Examples.Loops.PlanarLoops_analytic.pipe >> ../files/Modelica_3.1_Modelica.Mechanics.MultiBody.Examples.Loops.PlanarLoops_analytic.sim & ./Modelica_3.1_Modelica.Mechanics.MultiBody.Examples.Loops.PlanarLoops_analytic -abortSlowSimulation -alarm=480 -lv LOG_STATS > Modelica_3.1_Modelica.Mechanics.MultiBody.Examples.Loops.PlanarLoops_analytic.pipe 2>&1)