Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_9_Buildings.Fluid.Examples.Performance.Example3.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/Buildings 9.1.3-maint.9.1.x/package.mo", uses=false) Using package Buildings with version 9.1.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 9.1.3-maint.9.1.x/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(Buildings.Fluid.Examples.Performance.Example3,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5000,variableFilter="time|pump.m_flow",fileNamePrefix="Buildings_9_Buildings.Fluid.Examples.Performance.Example3") translateModel(Buildings.Fluid.Examples.Performance.Example3,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5000,variableFilter="time|pump.m_flow",fileNamePrefix="Buildings_9_Buildings.Fluid.Examples.Performance.Example3") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001515/0.001514, allocations: 103.4 kB / 15.33 MB, free: 0.5078 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001823/0.001823, allocations: 194.4 kB / 16.25 MB, free: 6.629 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.388/1.388, allocations: 222.9 MB / 239.9 MB, free: 4.461 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 9.1.3-maint.9.1.x/package.mo): time 2.394/2.394, allocations: 390.2 MB / 0.6643 GB, free: 0.5586 MB / 0.5137 GB Notification: Performance of FrontEnd - loaded program: time 0.001567/0.001567, allocations: 63.91 kB / 0.812 GB, free: 14.79 MB / 0.67 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.7156/0.7172, allocations: 140.3 MB / 0.9491 GB, free: 9.207 MB / 0.7169 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.Examples.Performance.Example3): time 0.03274/0.75, allocations: 32.52 MB / 0.9808 GB, free: 15.18 MB / 0.7481 GB Notification: Performance of NFInst.instExpressions: time 0.01897/0.769, allocations: 10.41 MB / 0.991 GB, free: 6.762 MB / 0.7481 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002833/0.7719, allocations: 47.75 kB / 0.9911 GB, free: 6.742 MB / 0.7481 GB Notification: Performance of NFTyping.typeComponents: time 0.002437/0.7744, allocations: 0.651 MB / 0.9917 GB, free: 6.246 MB / 0.7481 GB Notification: Performance of NFTyping.typeBindings: time 0.004996/0.7794, allocations: 1.457 MB / 0.9931 GB, free: 4.887 MB / 0.7481 GB Notification: Performance of NFTyping.typeClassSections: time 0.004024/0.7835, allocations: 1.292 MB / 0.9944 GB, free: 3.602 MB / 0.7481 GB Notification: Performance of NFFlatten.flatten: time 0.006707/0.7902, allocations: 4.92 MB / 0.9992 GB, free: 14.66 MB / 0.7637 GB Notification: Performance of NFFlatten.resolveConnections: time 0.003238/0.7935, allocations: 2.066 MB / 1.001 GB, free: 12.57 MB / 0.7637 GB Notification: Performance of NFEvalConstants.evaluate: time 0.005058/0.7985, allocations: 1.954 MB / 1.003 GB, free: 10.61 MB / 0.7637 GB Notification: Performance of NFSimplifyModel.simplify: time 0.00284/0.8014, allocations: 1.416 MB / 1.004 GB, free: 9.188 MB / 0.7637 GB Notification: Performance of NFPackage.collectConstants: time 0.0004073/0.8018, allocations: 144 kB / 1.005 GB, free: 9.047 MB / 0.7637 GB Notification: Performance of NFFlatten.collectFunctions: time 0.003565/0.8054, allocations: 1.162 MB / 1.006 GB, free: 7.883 MB / 0.7637 GB Notification: Performance of NFScalarize.scalarize: time 0.000749/0.8061, allocations: 474.3 kB / 1.006 GB, free: 7.418 MB / 0.7637 GB Notification: Performance of NFVerifyModel.verify: time 0.001762/0.8079, allocations: 1.01 MB / 1.007 GB, free: 6.402 MB / 0.7637 GB Notification: Performance of NFConvertDAE.convert: time 0.005525/0.8135, allocations: 2.925 MB / 1.01 GB, free: 3.469 MB / 0.7637 GB Notification: Performance of FrontEnd - DAE generated: time 8.716e-06/0.8135, allocations: 0 / 1.01 GB, free: 3.469 MB / 0.7637 GB Notification: Performance of FrontEnd: time 2.574e-06/0.8135, allocations: 7.938 kB / 1.01 GB, free: 3.461 MB / 0.7637 GB Notification: Performance of Transformations before backend: time 4.744e-05/0.8136, allocations: 0 / 1.01 GB, free: 3.461 MB / 0.7637 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 235 * Number of variables: 235 Notification: Performance of Generate backend data structure: time 0.005054/0.8186, allocations: 2.38 MB / 1.012 GB, free: 1.012 MB / 0.7637 GB Notification: Performance of prepare preOptimizeDAE: time 6.326e-05/0.8187, allocations: 12.03 kB / 1.012 GB, free: 1 MB / 0.7637 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.002003/0.8207, allocations: 390.1 kB / 1.013 GB, free: 0.6172 MB / 0.7637 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.003705/0.8244, allocations: 1.676 MB / 1.014 GB, free: 14.89 MB / 0.7794 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 9.006e-05/0.8245, allocations: 81.98 kB / 1.014 GB, free: 14.81 MB / 0.7794 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001682/0.8247, allocations: 107.9 kB / 1.015 GB, free: 14.71 MB / 0.7794 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002442/0.8272, allocations: 1.306 MB / 1.016 GB, free: 13.33 MB / 0.7794 GB Notification: Performance of preOpt findStateOrder (simulation): time 3.077e-05/0.8272, allocations: 4 kB / 1.016 GB, free: 13.32 MB / 0.7794 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001075/0.8273, allocations: 43.98 kB / 1.016 GB, free: 13.28 MB / 0.7794 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.208e-05/0.8274, allocations: 28 kB / 1.016 GB, free: 13.25 MB / 0.7794 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002096/0.8295, allocations: 1.034 MB / 1.017 GB, free: 12.21 MB / 0.7794 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 0.008542/0.838, allocations: 6.796 MB / 1.024 GB, free: 4.926 MB / 0.7794 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001512/0.8396, allocations: 0.641 MB / 1.024 GB, free: 4.277 MB / 0.7794 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0008104/0.8404, allocations: 414.4 kB / 1.025 GB, free: 3.867 MB / 0.7794 GB Notification: Performance of preOpt evalFunc (simulation): time 0.002824/0.8432, allocations: 1.687 MB / 1.026 GB, free: 2.043 MB / 0.7794 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0008701/0.8441, allocations: 400.8 kB / 1.027 GB, free: 1.641 MB / 0.7794 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0006409/0.8448, allocations: 103.3 kB / 1.027 GB, free: 1.539 MB / 0.7794 GB Notification: Performance of pre-optimization done (n=46): time 2.455e-06/0.8448, allocations: 0 / 1.027 GB, free: 1.539 MB / 0.7794 GB Notification: Performance of matching and sorting (n=46): time 0.003857/0.8486, allocations: 1.383 MB / 1.028 GB, free: 128 kB / 0.7794 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.934e-05/0.8487, allocations: 55.41 kB / 1.028 GB, free: 60 kB / 0.7794 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002465/0.8512, allocations: 1.777 MB / 1.03 GB, free: 14.24 MB / 0.795 GB Notification: Performance of collectPreVariables (initialization): time 9.2e-05/0.8513, allocations: 45.7 kB / 1.03 GB, free: 14.19 MB / 0.795 GB Notification: Performance of collectInitialEqns (initialization): time 0.0007794/0.8521, allocations: 0.8539 MB / 1.031 GB, free: 13.32 MB / 0.795 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001761/0.8523, allocations: 165.7 kB / 1.031 GB, free: 13.16 MB / 0.795 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002989/0.8526, allocations: 194.3 kB / 1.031 GB, free: 12.96 MB / 0.795 GB Notification: Performance of setup shared object (initialization): time 0.0001419/0.8527, allocations: 334 kB / 1.031 GB, free: 12.63 MB / 0.795 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0007515/0.8535, allocations: 340.6 kB / 1.032 GB, free: 12.3 MB / 0.795 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001092/0.8546, allocations: 0.779 MB / 1.032 GB, free: 11.32 MB / 0.795 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001742/0.8563, allocations: 1.027 MB / 1.033 GB, free: 10.14 MB / 0.795 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 8.166e-06/0.8563, allocations: 4 kB / 1.034 GB, free: 10.14 MB / 0.795 GB Notification: Performance of matching and sorting (n=99) (initialization): time 0.003016/0.8594, allocations: 1.344 MB / 1.035 GB, free: 8.777 MB / 0.795 GB Notification: Performance of prepare postOptimizeDAE: time 6.041e-05/0.8594, allocations: 33.7 kB / 1.035 GB, free: 8.738 MB / 0.795 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.656e-05/0.8595, allocations: 15.94 kB / 1.035 GB, free: 8.723 MB / 0.795 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0007208/0.8602, allocations: 185 kB / 1.035 GB, free: 8.539 MB / 0.795 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0007262/0.8609, allocations: 183.7 kB / 1.035 GB, free: 8.359 MB / 0.795 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0007225/0.8617, allocations: 0.7668 MB / 1.036 GB, free: 7.566 MB / 0.795 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001348/0.863, allocations: 92.5 kB / 1.036 GB, free: 7.477 MB / 0.795 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 9.624e-05/0.8631, allocations: 51.97 kB / 1.036 GB, free: 7.426 MB / 0.795 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.001402/0.8645, allocations: 0.7321 MB / 1.037 GB, free: 6.691 MB / 0.795 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0009668/0.8655, allocations: 0.7298 MB / 1.038 GB, free: 5.754 MB / 0.795 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001495/0.867, allocations: 0.9639 MB / 1.038 GB, free: 4.645 MB / 0.795 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 7.023e-06/0.867, allocations: 4 kB / 1.038 GB, free: 4.641 MB / 0.795 GB Notification: Performance of matching and sorting (n=99) (initialization_lambda0): time 0.002777/0.8698, allocations: 1.308 MB / 1.04 GB, free: 3.301 MB / 0.795 GB Notification: Performance of prepare postOptimizeDAE: time 5.315e-05/0.8699, allocations: 37.7 kB / 1.04 GB, free: 3.258 MB / 0.795 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.33e-05/0.8699, allocations: 12 kB / 1.04 GB, free: 3.246 MB / 0.795 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0002762/0.8702, allocations: 129.3 kB / 1.04 GB, free: 3.117 MB / 0.795 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0006525/0.8709, allocations: 179.6 kB / 1.04 GB, free: 2.941 MB / 0.795 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002376/0.8733, allocations: 2.317 MB / 1.042 GB, free: 500 kB / 0.795 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001335/0.8746, allocations: 96.56 kB / 1.042 GB, free: 400 kB / 0.795 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.253e-05/0.8747, allocations: 40.05 kB / 1.042 GB, free: 360 kB / 0.795 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 46 * Number of states: 0 () * Number of discrete variables: 8 (pulse.count,$PRE.pulse.count,pulse.T_start,$PRE.pulse.T_start,$whenCondition1,nRes.y,from_dp.y,mergeDp.y) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (85): * Single equations (assignments): 82 * Array equations: 1 * 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 {(1,12)} Notification: Performance of prepare postOptimizeDAE: time 0.0004388/0.8751, allocations: 243.9 kB / 1.043 GB, free: 108 kB / 0.795 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002952/0.8754, allocations: 182 kB / 1.043 GB, free: 15.92 MB / 0.8106 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002479/0.8779, allocations: 1.055 MB / 1.044 GB, free: 14.85 MB / 0.8106 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.336e-05/0.878, allocations: 11.94 kB / 1.044 GB, free: 14.84 MB / 0.8106 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 2.104e-06/0.878, allocations: 4 kB / 1.044 GB, free: 14.84 MB / 0.8106 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.001695/0.8797, allocations: 0.9918 MB / 1.045 GB, free: 13.78 MB / 0.8106 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.003887/0.8836, allocations: 2.163 MB / 1.047 GB, free: 11.54 MB / 0.8106 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.15e-06/0.8836, allocations: 0 / 1.047 GB, free: 11.54 MB / 0.8106 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0005216/0.8841, allocations: 103.9 kB / 1.047 GB, free: 11.43 MB / 0.8106 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0003038/0.8844, allocations: 124.7 kB / 1.047 GB, free: 11.31 MB / 0.8106 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.572e-05/0.8845, allocations: 15.98 kB / 1.047 GB, free: 11.29 MB / 0.8106 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0005979/0.8851, allocations: 0.731 MB / 1.048 GB, free: 10.54 MB / 0.8106 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 5.691e-06/0.8851, allocations: 3.984 kB / 1.048 GB, free: 10.54 MB / 0.8106 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002651/0.8878, allocations: 1.425 MB / 1.049 GB, free: 9.082 MB / 0.8106 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0005434/0.8883, allocations: 306.8 kB / 1.05 GB, free: 8.762 MB / 0.8106 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001777/0.8885, allocations: 8 kB / 1.05 GB, free: 8.754 MB / 0.8106 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0007514/0.8893, allocations: 79.92 kB / 1.05 GB, free: 8.676 MB / 0.8106 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001103/0.8894, allocations: 36.38 kB / 1.05 GB, free: 8.641 MB / 0.8106 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 6.663e-05/0.8895, allocations: 23.98 kB / 1.05 GB, free: 8.617 MB / 0.8106 GB Notification: Performance of sorting global known variables: time 0.001649/0.8911, allocations: 1.231 MB / 1.051 GB, free: 7.363 MB / 0.8106 GB Notification: Performance of sort global known variables: time 4.71e-07/0.8911, allocations: 0 / 1.051 GB, free: 7.363 MB / 0.8106 GB Notification: Performance of remove unused functions: time 0.00223/0.8934, allocations: 0.7916 MB / 1.052 GB, free: 6.57 MB / 0.8106 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 3 * Number of states: 1 (pump.vol.dynBal.U) * Number of discrete variables: 3 ($whenCondition1,pulse.T_start,pulse.count) * Number of discrete states: 1 (pulse.count) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (41): * Single equations (assignments): 35 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 3 * 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 {(1,12)} Notification: Performance of Backend phase and start with SimCode phase: time 0.0009337/0.8943, allocations: 390.5 kB / 1.052 GB, free: 6.188 MB / 0.8106 GB Notification: Performance of simCode: created initialization part: time 0.003229/0.8975, allocations: 1.598 MB / 1.054 GB, free: 4.551 MB / 0.8106 GB Notification: Performance of simCode: created event and clocks part: time 3.546e-06/0.8976, allocations: 3.938 kB / 1.054 GB, free: 4.547 MB / 0.8106 GB Notification: Performance of simCode: created simulation system equations: time 0.0007949/0.8984, allocations: 359.6 kB / 1.054 GB, free: 4.199 MB / 0.8106 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003041/0.9014, allocations: 0.7755 MB / 1.055 GB, free: 3.43 MB / 0.8106 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.005246/0.9067, allocations: 3.5 MB / 1.058 GB, free: 15.89 MB / 0.8262 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001086/0.9078, allocations: 1.496 MB / 1.06 GB, free: 14.36 MB / 0.8262 GB Notification: Performance of simCode: alias equations: time 0.001678/0.9095, allocations: 450.2 kB / 1.06 GB, free: 13.92 MB / 0.8262 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002768/0.9097, allocations: 131.4 kB / 1.06 GB, free: 13.79 MB / 0.8262 GB Notification: Performance of SimCode: time 6.71e-07/0.9098, allocations: 4 kB / 1.06 GB, free: 13.79 MB / 0.8262 GB Notification: Performance of Templates: time 0.05673/0.9665, allocations: 31.37 MB / 1.091 GB, free: 14.84 MB / 0.8575 GB make -j1 -f Buildings_9_Buildings.Fluid.Examples.Performance.Example3.makefile (rm -f Buildings_9_Buildings.Fluid.Examples.Performance.Example3.pipe ; mkfifo Buildings_9_Buildings.Fluid.Examples.Performance.Example3.pipe ; head -c 1048576 < Buildings_9_Buildings.Fluid.Examples.Performance.Example3.pipe >> ../files/Buildings_9_Buildings.Fluid.Examples.Performance.Example3.sim & ./Buildings_9_Buildings.Fluid.Examples.Performance.Example3 -abortSlowSimulation -alarm=480 -emit_protected -lv LOG_STATS > Buildings_9_Buildings.Fluid.Examples.Performance.Example3.pipe 2>&1) diffSimulationResults("Buildings_9_Buildings.Fluid.Examples.Performance.Example3_res.mat","/mnt/ReferenceFiles/Buildings/csv/maint_9.1.x/Buildings_Fluid_Examples_Performance_Example3.csv","/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_9_Buildings.Fluid.Examples.Performance.Example3.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) Reference file matches