Running: ./testmodel.py --libraries=/var/lib/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_master_Buildings.Controls.OBC.CDL.Logical.Validation.TrueHoldWithReset.conf.json Using package ModelicaServices with version 3.2.3 (/var/lib/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo) Using package Modelica with version 3.2.3 (/var/lib/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo) Using package Complex with version 3.2.3 (/var/lib/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo) Using package Buildings with version 9.0.0 (/var/lib/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 9.0.0-master/package.mo) Running command: translateModel(Buildings.Controls.OBC.CDL.Logical.Validation.TrueHoldWithReset,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_master_Buildings.Controls.OBC.CDL.Logical.Validation.TrueHoldWithReset") Notification: Performance of loadFile(/var/lib/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 9.0.0-master/package.mo): time 4.775/4.775, allocations: 0.5623 GB / 0.5775 GB, free: 3.355 MB / 474.7 MB Notification: Performance of loadFile(/var/lib/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo): time 0.00255/0.002549, allocations: 355.4 kB / 0.6446 GB, free: 185.6 MB / 474.7 MB Notification: Performance of loadFile(/var/lib/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 4.216/4.216, allocations: 410.7 MB / 1.113 GB, free: 5.938 MB / 0.6042 GB Notification: Performance of loadFile(/var/lib/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo): time 0.001906/0.001906, allocations: 185.1 kB / 1.226 GB, free: 6.125 MB / 0.7136 GB Notification: Performance of FrontEnd - loaded program: time 0.0006896/0.0006901, allocations: 16 kB / 1.349 GB, free: 8.246 MB / 0.8386 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.7388/0.7395, allocations: 115.3 MB / 1.461 GB, free: 284.3 MB / 0.8542 GB Notification: Performance of FrontEnd - scodeFlatten: time 0.2026/0.9422, allocations: 139.8 MB / 1.598 GB, free: 144.4 MB / 0.8542 GB Notification: Performance of FrontEnd - mkProgramGraph: time 0.0003135/0.9426, allocations: 84.7 kB / 1.598 GB, free: 144.3 MB / 0.8542 GB Notification: Performance of FrontEnd - DAE generated: time 0.084/1.027, allocations: 17.47 MB / 1.615 GB, free: 127 MB / 0.8542 GB Notification: Performance of FrontEnd: time 1.873e-06/1.027, allocations: 0 / 1.615 GB, free: 127 MB / 0.8542 GB Notification: Performance of Transformations before backend: time 5.743e-05/1.027, allocations: 32.58 kB / 1.615 GB, free: 126.9 MB / 0.8542 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 248 * Number of variables: 248 Notification: Performance of Generate backend data structure: time 0.002331/1.029, allocations: 1.127 MB / 1.616 GB, free: 125.7 MB / 0.8542 GB Notification: Performance of prepare preOptimizeDAE: time 4.004e-05/1.029, allocations: 11.62 kB / 1.616 GB, free: 125.7 MB / 0.8542 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.000298/1.029, allocations: 122.9 kB / 1.616 GB, free: 125.6 MB / 0.8542 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001012/1.03, allocations: 0.5447 MB / 1.617 GB, free: 125 MB / 0.8542 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001204/1.031, allocations: 106 kB / 1.617 GB, free: 124.9 MB / 0.8542 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0002737/1.031, allocations: 132 kB / 1.617 GB, free: 124.8 MB / 0.8542 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.00245/1.033, allocations: 1.186 MB / 1.618 GB, free: 123.5 MB / 0.8542 GB Notification: Performance of preOpt findStateOrder (simulation): time 4.326e-05/1.033, allocations: 7.938 kB / 1.618 GB, free: 123.5 MB / 0.8542 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001427/1.034, allocations: 52.62 kB / 1.618 GB, free: 123.4 MB / 0.8542 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.651e-05/1.034, allocations: 25.16 kB / 1.618 GB, free: 123.4 MB / 0.8542 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001851/1.035, allocations: 0.7248 MB / 1.619 GB, free: 122.7 MB / 0.8542 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.005835/1.041, allocations: 5.085 MB / 1.624 GB, free: 117.5 MB / 0.8542 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001645/1.043, allocations: 0.6436 MB / 1.625 GB, free: 116.8 MB / 0.8542 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0007854/1.044, allocations: 356.2 kB / 1.625 GB, free: 116.4 MB / 0.8542 GB Notification: Performance of preOpt evalFunc (simulation): time 4.764e-05/1.044, allocations: 15.98 kB / 1.625 GB, free: 116.4 MB / 0.8542 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.001178/1.045, allocations: 0.5535 MB / 1.625 GB, free: 115.8 MB / 0.8542 GB Notification: Performance of pre-optimization done (n=92): time 3.616e-06/1.045, allocations: 4.5 kB / 1.625 GB, free: 115.8 MB / 0.8542 GB Notification: Performance of matching and sorting (n=92): time 0.002929/1.048, allocations: 1.069 MB / 1.627 GB, free: 114.8 MB / 0.8542 GB Notification: Performance of inlineWhenForInitialization (initialization): time 6.97e-05/1.048, allocations: 145.2 kB / 1.627 GB, free: 114.6 MB / 0.8542 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0006178/1.049, allocations: 483.2 kB / 1.627 GB, free: 114.1 MB / 0.8542 GB Notification: Performance of collectPreVariables (initialization): time 0.0002116/1.049, allocations: 81.7 kB / 1.627 GB, free: 114 MB / 0.8542 GB Notification: Performance of collectInitialEqns (initialization): time 0.0003164/1.049, allocations: 400.1 kB / 1.628 GB, free: 113.6 MB / 0.8542 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002151/1.05, allocations: 217.4 kB / 1.628 GB, free: 113.4 MB / 0.8542 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001377/1.05, allocations: 36 kB / 1.628 GB, free: 113.4 MB / 0.8542 GB Notification: Performance of setup shared object (initialization): time 0.0001225/1.05, allocations: 382.8 kB / 1.628 GB, free: 113 MB / 0.8542 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001116/1.051, allocations: 374.2 kB / 1.629 GB, free: 112.6 MB / 0.8542 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001324/1.052, allocations: 0.8456 MB / 1.629 GB, free: 111.6 MB / 0.8542 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.00122/1.053, allocations: 0.529 MB / 1.63 GB, free: 111.1 MB / 0.8542 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.095e-05/1.054, allocations: 4 kB / 1.63 GB, free: 111.1 MB / 0.8542 GB Notification: Performance of matching and sorting (n=184) (initialization): time 0.003459/1.057, allocations: 1.422 MB / 1.631 GB, free: 109.6 MB / 0.8542 GB Notification: Performance of prepare postOptimizeDAE: time 0.0001064/1.057, allocations: 138.8 kB / 1.631 GB, free: 109.5 MB / 0.8542 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.303e-05/1.057, allocations: 12 kB / 1.631 GB, free: 109.4 MB / 0.8542 GB Notification: Performance of postOpt tearingSystem (initialization): time 4.744e-05/1.057, allocations: 28.53 kB / 1.631 GB, free: 109.4 MB / 0.8542 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000832/1.058, allocations: 156.8 kB / 1.632 GB, free: 109.3 MB / 0.8542 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 3.543e-05/1.058, allocations: 27.92 kB / 1.632 GB, free: 109.2 MB / 0.8542 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001704/1.06, allocations: 235.1 kB / 1.632 GB, free: 109 MB / 0.8542 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.000212/1.06, allocations: 84.8 kB / 1.632 GB, free: 108.9 MB / 0.8542 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 68 * Number of states: 0 () * Number of discrete variables: 132 ($PRE.truHol.onDelay.u,$PRE.truHol.toOutputTrue.enableFire,$PRE.truHol.toInitial.enableFire,$PRE.truHol1.onDelay.u,$PRE.truHol1.toOutputTrue.enableFire,$PRE.truHol1.toInitial.enableFire,$PRE.truHol2.onDelay.u,$PRE.truHol2.toOutputTrue.enableFire,$PRE.truHol2.toInitial.enableFire,$PRE.truHol3.onDelay.u,$PRE.truHol3.toOutputTrue.enableFire,$PRE.truHol3.toInitial.enableFire,$whenCondition18,$PRE.truHol.onDelay.t_next,$whenCondition16,$whenCondition17,$whenCondition19,$whenCondition20,$PRE.booPul.y,booPul.y,truHol.stateGraphRoot.activeSteps,truHol.onDelay.u,truHol.onDelay.y,$PRE.truHol.initialStep.localActive,truHol.initialStep.localActive,$PRE.truHol.initialStep.newActive,truHol.initialStep.newActive,$PRE.truHol.initialStep.oldActive,truHol.initialStep.oldActive,truHol.initialStep.active,$PRE.truHol.outputTrue.localActive,truHol.outputTrue.localActive,$PRE.truHol.outputTrue.newActive,truHol.outputTrue.newActive,$PRE.truHol.outputTrue.oldActive,truHol.outputTrue.oldActive,truHol.outputTrue.active,truHol.toOutputTrue.enableFire,truHol.toInitial.enableFire,truHol.onDelay.t_next,$whenCondition13,$PRE.truHol1.onDelay.t_next,$whenCondition11,$whenCondition12,$whenCondition14,$whenCondition15,$PRE.booPul1.y,booPul1.y,truHol1.stateGraphRoot.activeSteps,truHol1.onDelay.u,truHol1.onDelay.y,$PRE.truHol1.initialStep.localActive,truHol1.initialStep.localActive,$PRE.truHol1.initialStep.newActive,truHol1.initialStep.newActive,$PRE.truHol1.initialStep.oldActive,truHol1.initialStep.oldActive,truHol1.initialStep.active,$PRE.truHol1.outputTrue.localActive,truHol1.outputTrue.localActive,$PRE.truHol1.outputTrue.newActive,truHol1.outputTrue.newActive,$PRE.truHol1.outputTrue.oldActive,truHol1.outputTrue.oldActive,truHol1.outputTrue.active,truHol1.toOutputTrue.enableFire,truHol1.toInitial.enableFire,truHol1.onDelay.t_next,$whenCondition8,$PRE.truHol2.onDelay.t_next,$whenCondition6,$whenCondition7,$whenCondition9,$whenCondition10,$PRE.booPul2.y,booPul2.y,truHol2.stateGraphRoot.activeSteps,truHol2.onDelay.u,truHol2.onDelay.y,$PRE.truHol2.initialStep.localActive,truHol2.initialStep.localActive,$PRE.truHol2.initialStep.newActive,truHol2.initialStep.newActive,$PRE.truHol2.initialStep.oldActive,truHol2.initialStep.oldActive,truHol2.initialStep.active,$PRE.truHol2.outputTrue.localActive,truHol2.outputTrue.localActive,$PRE.truHol2.outputTrue.newActive,truHol2.outputTrue.newActive,$PRE.truHol2.outputTrue.oldActive,truHol2.outputTrue.oldActive,truHol2.outputTrue.active,truHol2.toOutputTrue.enableFire,truHol2.toInitial.enableFire,truHol2.onDelay.t_next,$whenCondition3,$PRE.truHol3.onDelay.t_next,$whenCondition1,$whenCondition2,$whenCondition4,$whenCondition5,$PRE.booPul3.y,booPul3.y,truHol3.stateGraphRoot.activeSteps,truHol3.onDelay.u,truHol3.onDelay.y,$PRE.truHol3.initialStep.localActive,truHol3.initialStep.localActive,$PRE.truHol3.initialStep.newActive,truHol3.initialStep.newActive,$PRE.truHol3.initialStep.oldActive,truHol3.initialStep.oldActive,truHol3.initialStep.active,$PRE.truHol3.outputTrue.localActive,truHol3.outputTrue.localActive,$PRE.truHol3.outputTrue.newActive,truHol3.outputTrue.newActive,$PRE.truHol3.outputTrue.oldActive,truHol3.outputTrue.oldActive,truHol3.outputTrue.active,truHol3.toOutputTrue.enableFire,truHol3.toInitial.enableFire,truHol3.onDelay.t_next,truHol.stateGraphRoot.resume,truHol.stateGraphRoot.suspend,truHol1.stateGraphRoot.resume,truHol1.stateGraphRoot.suspend,truHol2.stateGraphRoot.resume,truHol2.stateGraphRoot.suspend,truHol3.stateGraphRoot.resume,truHol3.stateGraphRoot.suspend) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (176): * Single equations (assignments): 172 * Array equations: 0 * Algorithm blocks: 4 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.0007893/1.061, allocations: 375.2 kB / 1.632 GB, free: 108.6 MB / 0.8542 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001589/1.061, allocations: 71.23 kB / 1.632 GB, free: 108.5 MB / 0.8542 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002261/1.063, allocations: 0.8949 MB / 1.633 GB, free: 107.6 MB / 0.8542 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.347e-05/1.063, allocations: 15.94 kB / 1.633 GB, free: 107.6 MB / 0.8542 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 8.336e-06/1.063, allocations: 0 / 1.633 GB, free: 107.6 MB / 0.8542 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.522e-05/1.063, allocations: 6.172 kB / 1.633 GB, free: 107.6 MB / 0.8542 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.004105/1.068, allocations: 2.372 MB / 1.636 GB, free: 105.1 MB / 0.8542 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 7.383e-06/1.068, allocations: 0 / 1.636 GB, free: 105.1 MB / 0.8542 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0003443/1.068, allocations: 51.84 kB / 1.636 GB, free: 105.1 MB / 0.8542 GB Notification: Performance of postOpt tearingSystem (simulation): time 1.13e-05/1.068, allocations: 4 kB / 1.636 GB, free: 105.1 MB / 0.8542 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 7.823e-05/1.068, allocations: 27.97 kB / 1.636 GB, free: 105 MB / 0.8542 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.038e-05/1.068, allocations: 8 kB / 1.636 GB, free: 105 MB / 0.8542 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.546e-06/1.068, allocations: 4.562 kB / 1.636 GB, free: 105 MB / 0.8542 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001988/1.07, allocations: 1.16 MB / 1.637 GB, free: 103.8 MB / 0.8542 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0001184/1.07, allocations: 128.3 kB / 1.637 GB, free: 103.7 MB / 0.8542 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001565/1.07, allocations: 32.83 kB / 1.637 GB, free: 103.7 MB / 0.8542 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0005261/1.071, allocations: 29.12 kB / 1.637 GB, free: 103.6 MB / 0.8542 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002465/1.071, allocations: 87.86 kB / 1.637 GB, free: 103.6 MB / 0.8542 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001032/1.071, allocations: 48.5 kB / 1.637 GB, free: 103.5 MB / 0.8542 GB Notification: Performance of sorting global known variables: time 0.0003209/1.072, allocations: 247.7 kB / 1.637 GB, free: 103.3 MB / 0.8542 GB Notification: Performance of sort global known variables: time 5.31e-07/1.072, allocations: 0 / 1.637 GB, free: 103.3 MB / 0.8542 GB Notification: Performance of remove unused functions: time 0.001376/1.073, allocations: 237.3 kB / 1.638 GB, free: 103 MB / 0.8542 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 4 * Number of states: 0 () * Number of discrete variables: 88 (truHol3.onDelay.u,truHol3.outputTrue.localActive,truHol3.outputTrue.active,truHol3.initialStep.active,$cse7,$cse8,$whenCondition3,$whenCondition4,$whenCondition5,$whenCondition1,$whenCondition2,booPul3.y,truHol3.stateGraphRoot.activeSteps,truHol3.onDelay.y,truHol3.onDelay.t_next,truHol3.initialStep.localActive,truHol3.initialStep.newActive,truHol3.initialStep.oldActive,truHol3.outputTrue.newActive,truHol3.outputTrue.oldActive,truHol3.toOutputTrue.enableFire,truHol3.toInitial.enableFire,truHol2.onDelay.u,truHol2.outputTrue.localActive,truHol2.outputTrue.active,truHol2.initialStep.active,$cse5,$cse6,$whenCondition8,$whenCondition9,$whenCondition10,$whenCondition6,$whenCondition7,booPul2.y,truHol2.stateGraphRoot.activeSteps,truHol2.onDelay.y,truHol2.onDelay.t_next,truHol2.initialStep.localActive,truHol2.initialStep.newActive,truHol2.initialStep.oldActive,truHol2.outputTrue.newActive,truHol2.outputTrue.oldActive,truHol2.toOutputTrue.enableFire,truHol2.toInitial.enableFire,truHol1.onDelay.u,truHol1.outputTrue.localActive,truHol1.outputTrue.active,truHol1.initialStep.active,$cse3,$cse4,$whenCondition13,$whenCondition14,$whenCondition15,$whenCondition11,$whenCondition12,booPul1.y,truHol1.stateGraphRoot.activeSteps,truHol1.onDelay.y,truHol1.onDelay.t_next,truHol1.initialStep.localActive,truHol1.initialStep.newActive,truHol1.initialStep.oldActive,truHol1.outputTrue.newActive,truHol1.outputTrue.oldActive,truHol1.toOutputTrue.enableFire,truHol1.toInitial.enableFire,truHol.onDelay.u,truHol.outputTrue.localActive,truHol.outputTrue.active,truHol.initialStep.active,$cse1,$cse2,$whenCondition18,$whenCondition19,$whenCondition20,$whenCondition16,$whenCondition17,booPul.y,truHol.stateGraphRoot.activeSteps,truHol.onDelay.y,truHol.onDelay.t_next,truHol.initialStep.localActive,truHol.initialStep.newActive,truHol.initialStep.oldActive,truHol.outputTrue.newActive,truHol.outputTrue.oldActive,truHol.toOutputTrue.enableFire,truHol.toInitial.enableFire) * Number of discrete states: 12 (truHol.onDelay.t_next,truHol.initialStep.newActive,truHol.outputTrue.newActive,truHol1.onDelay.t_next,truHol1.initialStep.newActive,truHol1.outputTrue.newActive,truHol2.onDelay.t_next,truHol2.initialStep.newActive,truHol2.outputTrue.newActive,truHol3.onDelay.t_next,truHol3.initialStep.newActive,truHol3.outputTrue.newActive) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (100): * Single equations (assignments): 80 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 20 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.0003179/1.073, allocations: 192.6 kB / 1.638 GB, free: 102.9 MB / 0.8542 GB Notification: Performance of simCode: created initialization part: time 0.002714/1.076, allocations: 1.236 MB / 1.639 GB, free: 101.6 MB / 0.8542 GB Notification: Performance of simCode: created event and clocks part: time 4.518e-06/1.076, allocations: 0 / 1.639 GB, free: 101.6 MB / 0.8542 GB Notification: Performance of simCode: created simulation system equations: time 0.000961/1.077, allocations: 427.5 kB / 1.639 GB, free: 101.2 MB / 0.8542 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001257/1.078, allocations: 132.2 kB / 1.64 GB, free: 101 MB / 0.8542 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.003138/1.082, allocations: 1.602 MB / 1.641 GB, free: 99.43 MB / 0.8542 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.000514/1.082, allocations: 0.9997 MB / 1.642 GB, free: 98.41 MB / 0.8542 GB Notification: Performance of simCode: alias equations: time 0.0006393/1.083, allocations: 112.2 kB / 1.642 GB, free: 98.29 MB / 0.8542 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0003147/1.083, allocations: 75.41 kB / 1.642 GB, free: 98.22 MB / 0.8542 GB Notification: Performance of SimCode: time 1.072e-06/1.083, allocations: 0 / 1.642 GB, free: 98.22 MB / 0.8542 GB Notification: Performance of Templates: time 0.02575/1.109, allocations: 9.656 MB / 1.652 GB, free: 88.77 MB / 0.8542 GB