Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Modelica_3.1_Modelica.Fluid.Examples.AST_BatchPlant.Test.TanksWithEmptyingPipe1.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.Fluid.Examples.AST_BatchPlant.Test.TanksWithEmptyingPipe1,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Modelica_3.1_Modelica.Fluid.Examples.AST_BatchPlant.Test.TanksWithEmptyingPipe1") translateModel(Modelica.Fluid.Examples.AST_BatchPlant.Test.TanksWithEmptyingPipe1,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Modelica_3.1_Modelica.Fluid.Examples.AST_BatchPlant.Test.TanksWithEmptyingPipe1") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.007274/0.007274, allocations: 101.3 kB / 15.73 MB, free: 6.449 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.00163/0.00163, allocations: 196.2 kB / 16.68 MB, free: 6.352 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.574/1.574, allocations: 205.1 MB / 222.5 MB, free: 4.492 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 0.001112/0.001112, allocations: 50.03 kB / 326.6 MB, free: 14.41 MB / 270.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.0878/0.08893, allocations: 46.63 MB / 373.2 MB, free: 1.316 MB / 302.1 MB Notification: Performance of NFInst.instantiate(Modelica.Fluid.Examples.AST_BatchPlant.Test.TanksWithEmptyingPipe1): time 0.02889/0.1178, allocations: 30.98 MB / 404.2 MB, free: 2.215 MB / 334.1 MB Notification: Performance of NFInst.instExpressions: time 0.02134/0.1392, allocations: 14.27 MB / 418.4 MB, free: 3.902 MB / 350.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.001815/0.1411, allocations: 43.69 kB / 418.5 MB, free: 3.859 MB / 350.1 MB Notification: Performance of NFTyping.typeComponents: time 0.002125/0.1433, allocations: 0.5784 MB / 419 MB, free: 3.277 MB / 350.1 MB Notification: Performance of NFTyping.typeBindings: time 0.006681/0.15, allocations: 2.177 MB / 421.2 MB, free: 1.09 MB / 350.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.009714/0.1597, allocations: 3.67 MB / 424.9 MB, free: 13.41 MB / 366.1 MB Notification: Performance of NFFlatten.flatten: time 0.006268/0.166, allocations: 3.972 MB / 428.9 MB, free: 9.426 MB / 366.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.00207/0.1681, allocations: 1.002 MB / 429.9 MB, free: 8.406 MB / 366.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.003395/0.1715, allocations: 1.468 MB / 431.3 MB, free: 6.934 MB / 366.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.002811/0.1744, allocations: 1.526 MB / 432.9 MB, free: 5.402 MB / 366.1 MB Notification: Performance of NFPackage.collectConstants: time 0.0006688/0.1751, allocations: 144 kB / 433 MB, free: 5.262 MB / 366.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.005363/0.1805, allocations: 2.32 MB / 435.3 MB, free: 2.938 MB / 366.1 MB Notification: Performance of NFScalarize.scalarize: time 0.001023/0.1815, allocations: 0.5493 MB / 435.9 MB, free: 2.387 MB / 366.1 MB Notification: Performance of NFVerifyModel.verify: time 0.00172/0.1832, allocations: 0.8204 MB / 436.7 MB, free: 1.562 MB / 366.1 MB Notification: Performance of NFConvertDAE.convert: time 0.007652/0.1909, allocations: 3.621 MB / 440.3 MB, free: 13.93 MB / 382.1 MB Notification: Performance of FrontEnd - DAE generated: time 4.94e-06/0.1909, allocations: 0 / 440.3 MB, free: 13.93 MB / 382.1 MB Notification: Performance of FrontEnd: time 1.764e-06/0.191, allocations: 0 / 440.3 MB, free: 13.93 MB / 382.1 MB Notification: Performance of Transformations before backend: time 7.272e-05/0.191, allocations: 0 / 440.3 MB, free: 13.93 MB / 382.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 256 * Number of variables: 256 Notification: Performance of Generate backend data structure: time 0.006035/0.1971, allocations: 2.157 MB / 442.5 MB, free: 11.71 MB / 382.1 MB Notification: Performance of prepare preOptimizeDAE: time 4.749e-05/0.1971, allocations: 8.031 kB / 442.5 MB, free: 11.7 MB / 382.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0008709/0.198, allocations: 187 kB / 442.7 MB, free: 11.52 MB / 382.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002005/0.2, allocations: 1.023 MB / 443.7 MB, free: 10.45 MB / 382.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 8.93e-05/0.2002, allocations: 77.97 kB / 443.8 MB, free: 10.38 MB / 382.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0002679/0.2004, allocations: 99.97 kB / 443.9 MB, free: 10.28 MB / 382.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.00266/0.2031, allocations: 1.636 MB / 445.5 MB, free: 8.562 MB / 382.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 2.821e-05/0.2031, allocations: 3.938 kB / 445.5 MB, free: 8.559 MB / 382.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001229/0.2033, allocations: 43.97 kB / 445.5 MB, free: 8.516 MB / 382.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0001362/0.2034, allocations: 105.9 kB / 445.6 MB, free: 8.41 MB / 382.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002599/0.206, allocations: 1.639 MB / 447.3 MB, free: 6.773 MB / 382.1 MB 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 0.183/0.3891, allocations: 6.654 MB / 453.9 MB, free: 73.26 MB / 382.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.001987/0.3911, allocations: 0.9233 MB / 454.9 MB, free: 73.23 MB / 382.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.00098/0.3921, allocations: 0.5566 MB / 455.4 MB, free: 73.22 MB / 382.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.003834/0.396, allocations: 2.808 MB / 458.2 MB, free: 71.65 MB / 382.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.475e-05/0.396, allocations: 46.72 kB / 458.3 MB, free: 71.6 MB / 382.1 MB Notification: Performance of pre-optimization done (n=80): time 3.176e-06/0.396, allocations: 2.906 kB / 458.3 MB, free: 71.6 MB / 382.1 MB Notification: Performance of matching and sorting (n=90): time 0.008252/0.4043, allocations: 3.737 MB / 462 MB, free: 69.96 MB / 382.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 5.899e-05/0.4044, allocations: 192 kB / 462.2 MB, free: 69.74 MB / 382.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001679/0.406, allocations: 1.313 MB / 463.5 MB, free: 69.22 MB / 382.1 MB Notification: Performance of collectPreVariables (initialization): time 8.262e-05/0.4061, allocations: 50.72 kB / 463.6 MB, free: 69.18 MB / 382.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.0003843/0.4065, allocations: 0.6666 MB / 464.2 MB, free: 68.69 MB / 382.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.0002094/0.4067, allocations: 332.5 kB / 464.6 MB, free: 68.48 MB / 382.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0003981/0.4071, allocations: 288.8 kB / 464.8 MB, free: 68.35 MB / 382.1 MB Notification: Performance of setup shared object (initialization): time 3.887e-05/0.4072, allocations: 308.8 kB / 465.1 MB, free: 68.05 MB / 382.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0008744/0.4081, allocations: 0.5839 MB / 465.7 MB, free: 67.84 MB / 382.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001047/0.4091, allocations: 1.001 MB / 466.7 MB, free: 67.13 MB / 382.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.001784/0.4109, allocations: 1.482 MB / 468.2 MB, free: 66.23 MB / 382.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 7.013e-06/0.4109, allocations: 3.938 kB / 468.2 MB, free: 66.23 MB / 382.1 MB Notification: Performance of matching and sorting (n=180) (initialization): time 0.002982/0.4139, allocations: 1.903 MB / 470.1 MB, free: 65.46 MB / 382.1 MB Notification: Performance of prepare postOptimizeDAE: time 2.458e-05/0.414, allocations: 13.62 kB / 470.1 MB, free: 65.46 MB / 382.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.917e-05/0.414, allocations: 11.44 kB / 470.1 MB, free: 65.46 MB / 382.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.004274/0.4183, allocations: 0.7738 MB / 470.9 MB, free: 65.2 MB / 382.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0009976/0.4193, allocations: 281.2 kB / 471.2 MB, free: 65.14 MB / 382.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001475/0.4208, allocations: 2.173 MB / 473.4 MB, free: 63.22 MB / 382.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001166/0.422, allocations: 65.44 kB / 473.4 MB, free: 63.19 MB / 382.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001081/0.4221, allocations: 71.38 kB / 473.5 MB, free: 63.17 MB / 382.1 MB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.001122/0.4232, allocations: 0.8412 MB / 474.3 MB, free: 62.69 MB / 382.1 MB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0008912/0.4241, allocations: 0.9986 MB / 475.3 MB, free: 61.85 MB / 382.1 MB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001479/0.4256, allocations: 1.459 MB / 476.8 MB, free: 60.8 MB / 382.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 7.434e-06/0.4256, allocations: 7.922 kB / 476.8 MB, free: 60.8 MB / 382.1 MB Notification: Performance of matching and sorting (n=180) (initialization_lambda0): time 0.00266/0.4283, allocations: 1.834 MB / 478.6 MB, free: 59.86 MB / 382.1 MB Notification: Performance of prepare postOptimizeDAE: time 1.61e-05/0.4283, allocations: 7.531 kB / 478.6 MB, free: 59.86 MB / 382.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.432e-05/0.4283, allocations: 14.72 kB / 478.7 MB, free: 59.86 MB / 382.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.003564/0.4319, allocations: 0.5905 MB / 479.2 MB, free: 59.56 MB / 382.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0009657/0.4329, allocations: 290.6 kB / 479.5 MB, free: 59.5 MB / 382.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001163/0.4341, allocations: 2.026 MB / 481.6 MB, free: 57.65 MB / 382.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001192/0.4353, allocations: 77.92 kB / 481.6 MB, free: 57.62 MB / 382.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.000112/0.4354, allocations: 66.7 kB / 481.7 MB, free: 57.6 MB / 382.1 MB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 53 * Number of states: 0 () * Number of discrete variables: 12 (tank2.aboveLevel[2],$PRE.tank2.aboveLevel[2],tank2.aboveLevel[1],$PRE.tank2.aboveLevel[1],tank1.aboveLevel[2],$PRE.tank1.aboveLevel[2],tank1.aboveLevel[1],$PRE.tank1.aboveLevel[1],tank2.ports_m_flow_out[2],tank2.ports_m_flow_out[1],tank1.ports_m_flow_out[2],tank1.ports_m_flow_out[1]) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (166): * Single equations (assignments): 163 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 3 * 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): 3 systems {(1,3), (2,7), (1,3)} Notification: Performance of prepare postOptimizeDAE: time 0.0003691/0.4358, allocations: 275.6 kB / 482 MB, free: 57.36 MB / 382.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002961/0.4361, allocations: 156.8 kB / 482.1 MB, free: 57.27 MB / 382.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002555/0.4386, allocations: 1.52 MB / 483.6 MB, free: 56.09 MB / 382.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 8.326e-06/0.4387, allocations: 12 kB / 483.6 MB, free: 56.07 MB / 382.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.591e-06/0.4387, allocations: 0 / 483.6 MB, free: 56.07 MB / 382.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 9.928e-06/0.4387, allocations: 7.969 kB / 483.7 MB, free: 56.07 MB / 382.1 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.003546/0.4422, allocations: 2.805 MB / 486.5 MB, free: 53.21 MB / 382.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.069e-06/0.4423, allocations: 3.984 kB / 486.5 MB, free: 53.21 MB / 382.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0006267/0.4429, allocations: 155 kB / 486.6 MB, free: 53.06 MB / 382.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 0.002403/0.4453, allocations: 0.5724 MB / 487.2 MB, free: 52.48 MB / 382.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 7.352e-05/0.4454, allocations: 23.98 kB / 487.2 MB, free: 52.45 MB / 382.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001256/0.4467, allocations: 2.129 MB / 489.3 MB, free: 50.25 MB / 382.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.234e-06/0.4467, allocations: 0 / 489.3 MB, free: 50.25 MB / 382.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002623/0.4493, allocations: 2.107 MB / 491.4 MB, free: 48.11 MB / 382.1 MB Notification: Performance of postOpt removeConstants (simulation): time 0.0003511/0.4497, allocations: 226.1 kB / 491.7 MB, free: 47.87 MB / 382.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002697/0.4499, allocations: 30.25 kB / 491.7 MB, free: 47.84 MB / 382.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.000839/0.4508, allocations: 47.95 kB / 491.7 MB, free: 47.8 MB / 382.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001599/0.451, allocations: 88.88 kB / 491.8 MB, free: 47.71 MB / 382.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 9.157e-05/0.4511, allocations: 43.97 kB / 491.9 MB, free: 47.67 MB / 382.1 MB Notification: Performance of sorting global known variables: time 0.001047/0.4521, allocations: 0.9045 MB / 492.8 MB, free: 46.76 MB / 382.1 MB Notification: Performance of sort global known variables: time 1.4e-07/0.4521, allocations: 3.938 kB / 492.8 MB, free: 46.76 MB / 382.1 MB Notification: Performance of remove unused functions: time 0.002543/0.4547, allocations: 1.13 MB / 493.9 MB, free: 45.75 MB / 382.1 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 5 * Number of states: 4 (tank1.level,tank1.medium.T,tank2.level,tank2.medium.T) * Number of discrete variables: 4 (tank1.aboveLevel[1],tank1.aboveLevel[2],tank2.aboveLevel[1],tank2.aboveLevel[2]) * Number of discrete states: 4 (tank1.aboveLevel[1],tank1.aboveLevel[2],tank2.aboveLevel[1],tank2.aboveLevel[2]) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (84): * Single equations (assignments): 81 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 3 * 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): 3 systems {(2,12), (1,6), (1,6)} Notification: Performance of Backend phase and start with SimCode phase: time 0.001985/0.4567, allocations: 0.8412 MB / 494.8 MB, free: 44.96 MB / 382.1 MB Notification: Performance of simCode: created initialization part: time 0.004306/0.461, allocations: 2.275 MB / 497 MB, free: 42.7 MB / 382.1 MB Notification: Performance of simCode: created event and clocks part: time 6.672e-06/0.461, allocations: 256 / 497 MB, free: 42.7 MB / 382.1 MB Notification: Performance of simCode: created simulation system equations: time 0.001124/0.4622, allocations: 0.6947 MB / 497.7 MB, free: 42.01 MB / 382.1 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002916/0.4651, allocations: 0.6377 MB / 498.4 MB, free: 41.38 MB / 382.1 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.003651/0.4687, allocations: 2.74 MB / 0.4894 GB, free: 38.63 MB / 382.1 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0005796/0.4693, allocations: 1.256 MB / 0.4906 GB, free: 37.34 MB / 382.1 MB Notification: Performance of simCode: alias equations: time 0.001569/0.4709, allocations: 0.572 MB / 0.4911 GB, free: 36.78 MB / 382.1 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.000317/0.4713, allocations: 119.4 kB / 0.4913 GB, free: 36.66 MB / 382.1 MB Notification: Performance of SimCode: time 5.71e-07/0.4713, allocations: 3.938 kB / 0.4913 GB, free: 36.66 MB / 382.1 MB Notification: Performance of Templates: time 0.04916/0.5204, allocations: 40.26 MB / 0.5306 GB, free: 12.35 MB / 398.1 MB make -j1 -f Modelica_3.1_Modelica.Fluid.Examples.AST_BatchPlant.Test.TanksWithEmptyingPipe1.makefile (rm -f Modelica_3.1_Modelica.Fluid.Examples.AST_BatchPlant.Test.TanksWithEmptyingPipe1.pipe ; mkfifo Modelica_3.1_Modelica.Fluid.Examples.AST_BatchPlant.Test.TanksWithEmptyingPipe1.pipe ; head -c 1048576 < Modelica_3.1_Modelica.Fluid.Examples.AST_BatchPlant.Test.TanksWithEmptyingPipe1.pipe >> ../files/Modelica_3.1_Modelica.Fluid.Examples.AST_BatchPlant.Test.TanksWithEmptyingPipe1.sim & ./Modelica_3.1_Modelica.Fluid.Examples.AST_BatchPlant.Test.TanksWithEmptyingPipe1 -abortSlowSimulation -alarm=480 -lv LOG_STATS > Modelica_3.1_Modelica.Fluid.Examples.AST_BatchPlant.Test.TanksWithEmptyingPipe1.pipe 2>&1)