Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.SeriesDpOptimised.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/IDEAS 3.0.0-master/package.mo", uses=false) Using package IDEAS with version 3.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/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(IDEAS.Fluid.Examples.Performance.PressureDrop.SeriesDpOptimised,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.SeriesDpOptimised") translateModel(IDEAS.Fluid.Examples.Performance.PressureDrop.SeriesDpOptimised,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.SeriesDpOptimised") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.00169/0.00169, allocations: 108 kB / 15.61 MB, free: 152 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.002189/0.002189, allocations: 195.4 kB / 16.53 MB, free: 6.664 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.425/1.425, allocations: 222.9 MB / 240.2 MB, free: 4.367 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/package.mo): time 0.9491/0.9491, allocations: 135.1 MB / 425.5 MB, free: 11.95 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001303/0.001303, allocations: 62.89 kB / 0.5053 GB, free: 5.312 MB / 414.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1691/0.1704, allocations: 80.92 MB / 0.5844 GB, free: 4.539 MB / 494.1 MB Notification: Performance of NFInst.instantiate(IDEAS.Fluid.Examples.Performance.PressureDrop.SeriesDpOptimised): time 0.4374/0.6078, allocations: 161.6 MB / 0.7422 GB, free: 7.859 MB / 0.5606 GB Notification: Performance of NFInst.instExpressions: time 0.005845/0.6137, allocations: 3.624 MB / 0.7457 GB, free: 4.945 MB / 0.5606 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0005253/0.6143, allocations: 10.75 kB / 0.7457 GB, free: 4.941 MB / 0.5606 GB Notification: Performance of NFTyping.typeComponents: time 0.0007232/0.615, allocations: 164.8 kB / 0.7459 GB, free: 4.805 MB / 0.5606 GB Notification: Performance of NFTyping.typeBindings: time 0.001694/0.6168, allocations: 0.5245 MB / 0.7464 GB, free: 4.406 MB / 0.5606 GB Notification: Performance of NFTyping.typeClassSections: time 0.001414/0.6182, allocations: 436.6 kB / 0.7468 GB, free: 4.109 MB / 0.5606 GB Notification: Performance of NFFlatten.flatten: time 0.003015/0.6212, allocations: 2.53 MB / 0.7493 GB, free: 2.73 MB / 0.5606 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001428/0.6227, allocations: 0.942 MB / 0.7502 GB, free: 2.203 MB / 0.5606 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001792/0.6245, allocations: 1.026 MB / 0.7512 GB, free: 1.676 MB / 0.5606 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001008/0.6255, allocations: 0.703 MB / 0.7519 GB, free: 1.277 MB / 0.5606 GB Notification: Performance of NFPackage.collectConstants: time 0.0001208/0.6256, allocations: 55.31 kB / 0.7519 GB, free: 1.277 MB / 0.5606 GB Notification: Performance of NFFlatten.collectFunctions: time 0.00148/0.6271, allocations: 0.7367 MB / 0.7527 GB, free: 0.6484 MB / 0.5606 GB Notification: Performance of NFScalarize.scalarize: time 0.0003187/0.6275, allocations: 314.9 kB / 0.753 GB, free: 348 kB / 0.5606 GB Notification: Performance of NFVerifyModel.verify: time 0.000797/0.6283, allocations: 0.5401 MB / 0.7535 GB, free: 15.79 MB / 0.5762 GB Notification: Performance of NFConvertDAE.convert: time 0.001877/0.6301, allocations: 1.394 MB / 0.7548 GB, free: 14.4 MB / 0.5762 GB Notification: Performance of FrontEnd - DAE generated: time 4.158e-06/0.6302, allocations: 0 / 0.7548 GB, free: 14.4 MB / 0.5762 GB Notification: Performance of FrontEnd: time 1.262e-06/0.6302, allocations: 0 / 0.7548 GB, free: 14.4 MB / 0.5762 GB Notification: Performance of Transformations before backend: time 4.402e-05/0.6302, allocations: 0 / 0.7548 GB, free: 14.4 MB / 0.5762 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 125 * Number of variables: 125 Notification: Performance of Generate backend data structure: time 0.002454/0.6327, allocations: 1.454 MB / 0.7563 GB, free: 12.89 MB / 0.5762 GB Notification: Performance of prepare preOptimizeDAE: time 3.859e-05/0.6327, allocations: 9.156 kB / 0.7563 GB, free: 12.88 MB / 0.5762 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0007552/0.6335, allocations: 190.5 kB / 0.7565 GB, free: 12.69 MB / 0.5762 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001125/0.6346, allocations: 0.7984 MB / 0.7572 GB, free: 11.84 MB / 0.5762 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.463e-05/0.6347, allocations: 44.98 kB / 0.7573 GB, free: 11.79 MB / 0.5762 GB Notification: Performance of preOpt expandDerOperator (simulation): time 8.087e-05/0.6348, allocations: 56 kB / 0.7573 GB, free: 11.74 MB / 0.5762 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001075/0.6358, allocations: 0.7926 MB / 0.7581 GB, free: 10.87 MB / 0.5762 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.659e-05/0.6359, allocations: 4 kB / 0.7581 GB, free: 10.87 MB / 0.5762 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 5.189e-05/0.6359, allocations: 21.12 kB / 0.7581 GB, free: 10.85 MB / 0.5762 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.569e-05/0.6359, allocations: 23.94 kB / 0.7582 GB, free: 10.82 MB / 0.5762 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0008598/0.6368, allocations: 0.5266 MB / 0.7587 GB, free: 10.3 MB / 0.5762 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 0.003778/0.6406, allocations: 4.607 MB / 0.7632 GB, free: 5.309 MB / 0.5762 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0006845/0.6413, allocations: 426.2 kB / 0.7636 GB, free: 4.883 MB / 0.5762 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0003633/0.6417, allocations: 246.4 kB / 0.7638 GB, free: 4.641 MB / 0.5762 GB Notification: Performance of preOpt evalFunc (simulation): time 0.000279/0.642, allocations: 194.2 kB / 0.764 GB, free: 4.414 MB / 0.5762 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0004716/0.6424, allocations: 297.6 kB / 0.7643 GB, free: 4.105 MB / 0.5762 GB Notification: Performance of pre-optimization done (n=31): time 3.467e-06/0.6425, allocations: 0 / 0.7643 GB, free: 4.105 MB / 0.5762 GB Notification: Performance of matching and sorting (n=31): time 0.003766/0.6462, allocations: 1.317 MB / 0.7656 GB, free: 2.773 MB / 0.5762 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.992e-05/0.6463, allocations: 85.09 kB / 0.7656 GB, free: 2.672 MB / 0.5762 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001343/0.6476, allocations: 1.118 MB / 0.7667 GB, free: 1.535 MB / 0.5762 GB Notification: Performance of collectPreVariables (initialization): time 5.546e-05/0.6477, allocations: 41.7 kB / 0.7668 GB, free: 1.488 MB / 0.5762 GB Notification: Performance of collectInitialEqns (initialization): time 0.0003765/0.6481, allocations: 489.1 kB / 0.7672 GB, free: 1.008 MB / 0.5762 GB Notification: Performance of collectInitialBindings (initialization): time 8.822e-05/0.6482, allocations: 110.5 kB / 0.7673 GB, free: 0.8984 MB / 0.5762 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001548/0.6483, allocations: 114 kB / 0.7675 GB, free: 0.7812 MB / 0.5762 GB Notification: Performance of setup shared object (initialization): time 0.0001058/0.6485, allocations: 326 kB / 0.7678 GB, free: 468 kB / 0.5762 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0003548/0.6488, allocations: 210.4 kB / 0.768 GB, free: 252 kB / 0.5762 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0005654/0.6494, allocations: 0.5174 MB / 0.7685 GB, free: 15.59 MB / 0.5919 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0008253/0.6502, allocations: 0.6273 MB / 0.7691 GB, free: 14.89 MB / 0.5919 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.717e-06/0.6502, allocations: 0 / 0.7691 GB, free: 14.89 MB / 0.5919 GB Notification: Performance of matching and sorting (n=54) (initialization): time 0.00223/0.6525, allocations: 1.056 MB / 0.7701 GB, free: 13.82 MB / 0.5919 GB Notification: Performance of prepare postOptimizeDAE: time 4.468e-05/0.6525, allocations: 40.66 kB / 0.7702 GB, free: 13.77 MB / 0.5919 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.249e-05/0.6526, allocations: 4 kB / 0.7702 GB, free: 13.77 MB / 0.5919 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.00136/0.6539, allocations: 358.9 kB / 0.7705 GB, free: 13.42 MB / 0.5919 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002268/0.6542, allocations: 67.83 kB / 0.7706 GB, free: 13.35 MB / 0.5919 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0009768/0.6551, allocations: 1.005 MB / 0.7715 GB, free: 12.32 MB / 0.5919 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0006758/0.6558, allocations: 75.56 kB / 0.7716 GB, free: 12.25 MB / 0.5919 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.801e-05/0.6559, allocations: 27.98 kB / 0.7716 GB, free: 12.22 MB / 0.5919 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.000706/0.6566, allocations: 0.4928 MB / 0.7721 GB, free: 11.72 MB / 0.5919 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0005066/0.6571, allocations: 492.5 kB / 0.7726 GB, free: 11.11 MB / 0.5919 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0006961/0.6578, allocations: 0.5566 MB / 0.7731 GB, free: 10.47 MB / 0.5919 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 3.797e-06/0.6579, allocations: 112 / 0.7731 GB, free: 10.47 MB / 0.5919 GB Notification: Performance of matching and sorting (n=54) (initialization_lambda0): time 0.001447/0.6593, allocations: 0.8298 MB / 0.774 GB, free: 9.625 MB / 0.5919 GB Notification: Performance of prepare postOptimizeDAE: time 3.48e-05/0.6594, allocations: 38.27 kB / 0.774 GB, free: 9.582 MB / 0.5919 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.971e-06/0.6594, allocations: 7.938 kB / 0.774 GB, free: 9.574 MB / 0.5919 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0005106/0.6599, allocations: 223.1 kB / 0.7742 GB, free: 9.355 MB / 0.5919 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0001975/0.6601, allocations: 55.91 kB / 0.7743 GB, free: 9.301 MB / 0.5919 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.003569/0.6637, allocations: 3.334 MB / 0.7775 GB, free: 5.805 MB / 0.5919 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0007373/0.6644, allocations: 76.02 kB / 0.7776 GB, free: 5.73 MB / 0.5919 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.832e-05/0.6645, allocations: 24 kB / 0.7776 GB, free: 5.707 MB / 0.5919 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 24 * Number of states: 0 () * Number of discrete variables: 5 (pulse_p.count,$PRE.pulse_p.count,pulse_p.T_start,$PRE.pulse_p.T_start,$whenCondition1) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (34): * Single equations (assignments): 32 * Array equations: 0 * Algorithm blocks: 1 * 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 {(1,19)} Notification: Performance of prepare postOptimizeDAE: time 0.0002241/0.6647, allocations: 212.3 kB / 0.7778 GB, free: 5.492 MB / 0.5919 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.000139/0.6649, allocations: 106.7 kB / 0.7779 GB, free: 5.387 MB / 0.5919 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001257/0.6661, allocations: 0.7142 MB / 0.7786 GB, free: 4.664 MB / 0.5919 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 5.751e-06/0.6661, allocations: 4 kB / 0.7786 GB, free: 4.66 MB / 0.5919 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 3.337e-06/0.6661, allocations: 4 kB / 0.7786 GB, free: 4.656 MB / 0.5919 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.83e-06/0.6662, allocations: 0 / 0.7786 GB, free: 4.656 MB / 0.5919 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002266/0.6684, allocations: 1.607 MB / 0.7802 GB, free: 2.969 MB / 0.5919 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.37e-06/0.6684, allocations: 4 kB / 0.7802 GB, free: 2.965 MB / 0.5919 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001114/0.6686, allocations: 19.98 kB / 0.7802 GB, free: 2.945 MB / 0.5919 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0004424/0.669, allocations: 224.9 kB / 0.7804 GB, free: 2.723 MB / 0.5919 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.427e-05/0.669, allocations: 8 kB / 0.7804 GB, free: 2.715 MB / 0.5919 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0008428/0.6699, allocations: 0.9796 MB / 0.7814 GB, free: 1.711 MB / 0.5919 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 6.172e-06/0.6699, allocations: 11.97 kB / 0.7814 GB, free: 1.699 MB / 0.5919 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001185/0.6711, allocations: 0.8174 MB / 0.7822 GB, free: 0.8398 MB / 0.5919 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0002914/0.6714, allocations: 211.9 kB / 0.7824 GB, free: 0.6133 MB / 0.5919 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001135/0.6715, allocations: 11.94 kB / 0.7824 GB, free: 0.6016 MB / 0.5919 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0004071/0.6719, allocations: 27.97 kB / 0.7824 GB, free: 0.5742 MB / 0.5919 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 8.527e-05/0.672, allocations: 31.91 kB / 0.7825 GB, free: 0.543 MB / 0.5919 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.783e-05/0.6721, allocations: 15.98 kB / 0.7825 GB, free: 0.5273 MB / 0.5919 GB Notification: Performance of sorting global known variables: time 0.000952/0.673, allocations: 0.7878 MB / 0.7833 GB, free: 15.73 MB / 0.6075 GB Notification: Performance of sort global known variables: time 1.4e-07/0.673, allocations: 4 kB / 0.7833 GB, free: 15.72 MB / 0.6075 GB Notification: Performance of remove unused functions: time 0.001208/0.6742, allocations: 431.4 kB / 0.7837 GB, free: 15.3 MB / 0.6075 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 8 * Number of states: 0 () * Number of discrete variables: 3 ($whenCondition1,pulse_p.T_start,pulse_p.count) * Number of discrete states: 1 (pulse_p.count) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (12): * Single equations (assignments): 9 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 2 * 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 {(1,19)} Notification: Performance of Backend phase and start with SimCode phase: time 0.0004107/0.6747, allocations: 176.7 kB / 0.7838 GB, free: 15.13 MB / 0.6075 GB Notification: Performance of simCode: created initialization part: time 0.001875/0.6765, allocations: 1.081 MB / 0.7849 GB, free: 14.02 MB / 0.6075 GB Notification: Performance of simCode: created event and clocks part: time 3.636e-06/0.6766, allocations: 7.938 kB / 0.7849 GB, free: 14.01 MB / 0.6075 GB Notification: Performance of simCode: created simulation system equations: time 0.0004961/0.6771, allocations: 230.6 kB / 0.7851 GB, free: 13.78 MB / 0.6075 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.00195/0.679, allocations: 466.6 kB / 0.7856 GB, free: 13.35 MB / 0.6075 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.002782/0.6818, allocations: 1.771 MB / 0.7873 GB, free: 11.52 MB / 0.6075 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0007327/0.6826, allocations: 1.188 MB / 0.7885 GB, free: 10.3 MB / 0.6075 GB Notification: Performance of simCode: alias equations: time 0.000866/0.6834, allocations: 303.8 kB / 0.7887 GB, free: 10 MB / 0.6075 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001116/0.6836, allocations: 55.44 kB / 0.7888 GB, free: 9.949 MB / 0.6075 GB Notification: Performance of SimCode: time 1.734e-06/0.6836, allocations: 4 kB / 0.7888 GB, free: 9.945 MB / 0.6075 GB Notification: Performance of Templates: time 0.03333/0.7169, allocations: 19.62 MB / 0.808 GB, free: 6.555 MB / 0.6231 GB make -j1 -f IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.SeriesDpOptimised.makefile (rm -f IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.SeriesDpOptimised.pipe ; mkfifo IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.SeriesDpOptimised.pipe ; head -c 1048576 < IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.SeriesDpOptimised.pipe >> ../files/IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.SeriesDpOptimised.sim & ./IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.SeriesDpOptimised -abortSlowSimulation -alarm=480 -lv LOG_STATS > IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.SeriesDpOptimised.pipe 2>&1)