Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr ScalableTestSuite_noopt_ScalableTestSuite.Thermal.HeatExchanger.ScaledExperiments.CocurrentHeatExchangerEquations_N_10.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/ScalableTestSuite 2.2.0-master/package.mo", uses=false)
Using package ScalableTestSuite with version 2.2.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ScalableTestSuite 2.2.0-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(ScalableTestSuite.Thermal.HeatExchanger.ScaledExperiments.CocurrentHeatExchangerEquations_N_10,tolerance=1e-08,outputFormat="mat",numberOfIntervals=5000,variableFilter="QA.1.|QA.2.|QA.3.|QB.1.|QB.2.|QB.3.|TA.10.|TA.1.|TA.2.|TA.3.|TB.10.|TB.1.|TB.2.|TB.3.|TW.1.|TW.2.|TW.3.|der.TA.10..|der.TA.2..|der.TA.3..|der.TB.10..|der.TB.2..|der.TB.3..|der.TW.1..|der.TW.2..|der.TW.3..|time|time",fileNamePrefix="ScalableTestSuite_noopt_ScalableTestSuite.Thermal.HeatExchanger.ScaledExperiments.CocurrentHeatExchangerEquations_N_10")
translateModel(ScalableTestSuite.Thermal.HeatExchanger.ScaledExperiments.CocurrentHeatExchangerEquations_N_10,tolerance=1e-08,outputFormat="mat",numberOfIntervals=5000,variableFilter="QA.1.|QA.2.|QA.3.|QB.1.|QB.2.|QB.3.|TA.10.|TA.1.|TA.2.|TA.3.|TB.10.|TB.1.|TB.2.|TB.3.|TW.1.|TW.2.|TW.3.|der.TA.10..|der.TA.2..|der.TA.3..|der.TB.10..|der.TB.2..|der.TB.3..|der.TW.1..|der.TW.2..|der.TW.3..|time|time",fileNamePrefix="ScalableTestSuite_noopt_ScalableTestSuite.Thermal.HeatExchanger.ScaledExperiments.CocurrentHeatExchangerEquations_N_10")
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.00121/0.00121, allocations: 104.8 kB / 16.92 MB, free: 6.145 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001185/0.001185, allocations: 187.4 kB / 17.85 MB, free: 5.285 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.327/1.327, allocations: 222.9 MB / 241.6 MB, free: 15.2 MB / 206.1 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ScalableTestSuite 2.2.0-master/package.mo): time 0.928/0.928, allocations: 119.3 MB / 411 MB, free: 9.555 MB / 334.1 MB
Notification: Performance of FrontEnd - loaded program: time 0.001426/0.001426, allocations: 59.89 kB / 0.4923 GB, free: 12.34 MB / 430.1 MB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.4654/0.4668, allocations: 80.69 MB / 0.5711 GB, free: 43.72 MB / 462.3 MB
Notification: Performance of NFInst.instantiate(ScalableTestSuite.Thermal.HeatExchanger.ScaledExperiments.CocurrentHeatExchangerEquations_N_10): time 0.002115/0.469, allocations: 1.448 MB / 0.5725 GB, free: 42.57 MB / 462.3 MB
Notification: Performance of NFInst.instExpressions: time 0.0002483/0.4693, allocations: 89.3 kB / 0.5726 GB, free: 42.5 MB / 462.3 MB
Notification: Performance of NFInst.updateImplicitVariability: time 4.003e-05/0.4693, allocations: 5.312 kB / 0.5726 GB, free: 42.5 MB / 462.3 MB
Notification: Performance of NFTyping.typeComponents: time 9.644e-05/0.4694, allocations: 13.3 kB / 0.5726 GB, free: 42.49 MB / 462.3 MB
Notification: Performance of NFTyping.typeBindings: time 0.0001133/0.4695, allocations: 67.14 kB / 0.5727 GB, free: 42.44 MB / 462.3 MB
Notification: Performance of NFTyping.typeClassSections: time 0.0001797/0.4697, allocations: 26.52 kB / 0.5727 GB, free: 42.42 MB / 462.3 MB
Notification: Performance of NFFlatten.flatten: time 0.0004193/0.4701, allocations: 0.5712 MB / 0.5733 GB, free: 42.11 MB / 462.3 MB
Notification: Performance of NFFlatten.resolveConnections: time 6.033e-05/0.4702, allocations: 13.2 kB / 0.5733 GB, free: 42.11 MB / 462.3 MB
Notification: Performance of NFEvalConstants.evaluate: time 0.0001674/0.4704, allocations: 208.6 kB / 0.5735 GB, free: 42.02 MB / 462.3 MB
Notification: Performance of NFSimplifyModel.simplify: time 0.000331/0.4707, allocations: 282.8 kB / 0.5738 GB, free: 41.84 MB / 462.3 MB
Notification: Performance of NFPackage.collectConstants: time 7.611e-05/0.4708, allocations: 29.75 kB / 0.5738 GB, free: 41.84 MB / 462.3 MB
Notification: Performance of NFFlatten.collectFunctions: time 7.985e-05/0.4709, allocations: 29.28 kB / 0.5738 GB, free: 41.84 MB / 462.3 MB
Notification: Performance of NFScalarize.scalarize: time 0.0001354/0.471, allocations: 186.8 kB / 0.574 GB, free: 41.72 MB / 462.3 MB
Notification: Performance of NFVerifyModel.verify: time 0.000196/0.4712, allocations: 196.8 kB / 0.5742 GB, free: 41.6 MB / 462.3 MB
Notification: Performance of NFConvertDAE.convert: time 0.0002588/0.4715, allocations: 332.5 kB / 0.5745 GB, free: 41.42 MB / 462.3 MB
Notification: Performance of FrontEnd - DAE generated: time 4.147e-06/0.4715, allocations: 0 / 0.5745 GB, free: 41.42 MB / 462.3 MB
Notification: Performance of FrontEnd: time 1.452e-06/0.4715, allocations: 0 / 0.5745 GB, free: 41.42 MB / 462.3 MB
Notification: Performance of Transformations before backend: time 7.353e-06/0.4715, allocations: 0 / 0.5745 GB, free: 41.42 MB / 462.3 MB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 68
 * Number of variables: 68
Notification: Performance of Generate backend data structure: time 0.002082/0.4736, allocations: 0.8489 MB / 0.5753 GB, free: 40.8 MB / 462.3 MB
Notification: Performance of prepare preOptimizeDAE: time 3.572e-05/0.4737, allocations: 14.39 kB / 0.5753 GB, free: 40.8 MB / 462.3 MB
Notification: Performance of preOpt normalInlineFunction (simulation): time 8.842e-05/0.4737, allocations: 30.56 kB / 0.5754 GB, free: 40.79 MB / 462.3 MB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.0002644/0.474, allocations: 258.1 kB / 0.5756 GB, free: 40.54 MB / 462.3 MB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 2.576e-05/0.474, allocations: 31.59 kB / 0.5756 GB, free: 40.52 MB / 462.3 MB
Notification: Performance of preOpt expandDerOperator (simulation): time 7.944e-05/0.4741, allocations: 53.3 kB / 0.5757 GB, free: 40.5 MB / 462.3 MB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.0006383/0.4748, allocations: 441.9 kB / 0.5761 GB, free: 40.25 MB / 462.3 MB
Notification: Performance of preOpt findStateOrder (simulation): time 1.085e-05/0.4748, allocations: 1.594 kB / 0.5761 GB, free: 40.25 MB / 462.3 MB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 4.12e-05/0.4748, allocations: 13.34 kB / 0.5761 GB, free: 40.24 MB / 462.3 MB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 8.977e-06/0.4749, allocations: 7.75 kB / 0.5761 GB, free: 40.24 MB / 462.3 MB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0005571/0.4754, allocations: 377.6 kB / 0.5765 GB, free: 40.08 MB / 462.3 MB
Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.002499/0.4779, allocations: 2.162 MB / 0.5786 GB, free: 38.18 MB / 462.3 MB
Notification: Performance of preOpt comSubExp (simulation): time 0.0007884/0.4787, allocations: 481.3 kB / 0.5791 GB, free: 37.95 MB / 462.3 MB
Notification: Performance of preOpt resolveLoops (simulation): time 0.000461/0.4792, allocations: 324.8 kB / 0.5794 GB, free: 37.8 MB / 462.3 MB
Notification: Performance of preOpt evalFunc (simulation): time 4.459e-05/0.4792, allocations: 5.031 kB / 0.5794 GB, free: 37.8 MB / 462.3 MB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 1.573e-05/0.4793, allocations: 45.72 kB / 0.5794 GB, free: 37.75 MB / 462.3 MB
Notification: Performance of pre-optimization done (n=49): time 1.573e-06/0.4793, allocations: 0 / 0.5794 GB, free: 37.75 MB / 462.3 MB
Notification: Performance of matching and sorting (n=49): time 0.001298/0.4806, allocations: 0.8115 MB / 0.5802 GB, free: 37.37 MB / 462.3 MB
Notification: Performance of inlineWhenForInitialization (initialization): time 2.78e-05/0.4806, allocations: 56.91 kB / 0.5803 GB, free: 37.3 MB / 462.3 MB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 7.778e-05/0.4807, allocations: 133.7 kB / 0.5804 GB, free: 37.18 MB / 462.3 MB
Notification: Performance of collectPreVariables (initialization): time 3.642e-05/0.4807, allocations: 36.23 kB / 0.5804 GB, free: 37.14 MB / 462.3 MB
Notification: Performance of collectInitialEqns (initialization): time 4.422e-05/0.4808, allocations: 124.7 kB / 0.5806 GB, free: 37.02 MB / 462.3 MB
Notification: Performance of collectInitialBindings (initialization): time 0.000103/0.4809, allocations: 209.1 kB / 0.5808 GB, free: 36.84 MB / 462.3 MB
Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001596/0.4811, allocations: 114.9 kB / 0.5809 GB, free: 36.77 MB / 462.3 MB
Notification: Performance of setup shared object (initialization): time 5.28e-05/0.4811, allocations: 343.6 kB / 0.5812 GB, free: 36.44 MB / 462.3 MB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.0004157/0.4815, allocations: 275.2 kB / 0.5815 GB, free: 36.32 MB / 462.3 MB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.0004362/0.482, allocations: 332.1 kB / 0.5818 GB, free: 36.16 MB / 462.3 MB
Notification: Performance of analyzeInitialSystem (initialization): time 0.0008706/0.4829, allocations: 0.613 MB / 0.5824 GB, free: 35.87 MB / 462.3 MB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.224e-06/0.4829, allocations: 5.281 kB / 0.5824 GB, free: 35.86 MB / 462.3 MB
Notification: Performance of matching and sorting (n=77) (initialization): time 0.001059/0.4839, allocations: 0.7272 MB / 0.5831 GB, free: 35.52 MB / 462.3 MB
Notification: Performance of prepare postOptimizeDAE: time 1.529e-05/0.484, allocations: 11.91 kB / 0.5831 GB, free: 35.52 MB / 462.3 MB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.18e-06/0.484, allocations: 1.25 kB / 0.5831 GB, free: 35.52 MB / 462.3 MB
Notification: Performance of postOpt tearingSystem (initialization): time 1.827e-05/0.484, allocations: 3.156 kB / 0.5831 GB, free: 35.52 MB / 462.3 MB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001026/0.485, allocations: 257.3 kB / 0.5833 GB, free: 35.47 MB / 462.3 MB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.077e-05/0.485, allocations: 10.59 kB / 0.5834 GB, free: 35.46 MB / 462.3 MB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0003384/0.4854, allocations: 58.81 kB / 0.5834 GB, free: 35.42 MB / 462.3 MB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.086e-05/0.4854, allocations: 21.34 kB / 0.5834 GB, free: 35.41 MB / 462.3 MB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 2
 * Number of states: 0 ()
 * Number of discrete variables: 0 ()
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for initialization (77):
 * Single equations (assignments): 77
 * Array equations: 0
 * 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 0.0001451/0.4856, allocations: 159.1 kB / 0.5836 GB, free: 35.27 MB / 462.3 MB
Notification: Performance of postOpt lateInlineFunction (simulation): time 6.911e-05/0.4857, allocations: 28.03 kB / 0.5836 GB, free: 35.25 MB / 462.3 MB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0001509/0.4858, allocations: 75.66 kB / 0.5837 GB, free: 35.19 MB / 462.3 MB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 5.45e-06/0.4858, allocations: 5.219 kB / 0.5837 GB, free: 35.19 MB / 462.3 MB
Notification: Performance of postOpt constantLinearSystem (simulation): time 8.025e-06/0.4858, allocations: 1.188 kB / 0.5837 GB, free: 35.19 MB / 462.3 MB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 5.189e-06/0.4858, allocations: 3.984 kB / 0.5837 GB, free: 35.18 MB / 462.3 MB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0004949/0.4863, allocations: 470.3 kB / 0.5841 GB, free: 34.82 MB / 462.3 MB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.623e-06/0.4864, allocations: 0 / 0.5841 GB, free: 34.82 MB / 462.3 MB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.00126/0.4876, allocations: 264.9 kB / 0.5844 GB, free: 34.76 MB / 462.3 MB
Notification: Performance of postOpt tearingSystem (simulation): time 3.927e-06/0.4876, allocations: 2.094 kB / 0.5844 GB, free: 34.76 MB / 462.3 MB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 5.09e-05/0.4877, allocations: 22.05 kB / 0.5844 GB, free: 34.75 MB / 462.3 MB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 2.695e-06/0.4877, allocations: 1.156 kB / 0.5844 GB, free: 34.75 MB / 462.3 MB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 8.11e-07/0.4877, allocations: 1.125 kB / 0.5844 GB, free: 34.75 MB / 462.3 MB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001317/0.489, allocations: 1.006 MB / 0.5854 GB, free: 34.22 MB / 462.3 MB
Notification: Performance of postOpt removeConstants (simulation): time 3.335e-05/0.4891, allocations: 111 kB / 0.5855 GB, free: 34.1 MB / 462.3 MB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 6.899e-05/0.4891, allocations: 26.02 kB / 0.5855 GB, free: 34.08 MB / 462.3 MB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0003518/0.4895, allocations: 20.81 kB / 0.5855 GB, free: 34.07 MB / 462.3 MB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001002/0.4896, allocations: 29.52 kB / 0.5856 GB, free: 34.05 MB / 462.3 MB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.339e-05/0.4896, allocations: 13.69 kB / 0.5856 GB, free: 34.05 MB / 462.3 MB
Notification: Performance of sorting global known variables: time 3.764e-05/0.4897, allocations: 94.2 kB / 0.5857 GB, free: 33.97 MB / 462.3 MB
Notification: Performance of sort global known variables: time 6.21e-07/0.4897, allocations: 1.062 kB / 0.5857 GB, free: 33.97 MB / 462.3 MB
Notification: Performance of remove unused functions: time 0.0003662/0.4901, allocations: 159.5 kB / 0.5858 GB, free: 33.87 MB / 462.3 MB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 1
 * Number of states: 27 (TAtilde[1],TAtilde[2],TAtilde[3],TAtilde[4],TAtilde[5],TAtilde[6],TAtilde[7],TAtilde[8],TAtilde[9],TBtilde[1],TBtilde[2],TBtilde[3],TBtilde[4],TBtilde[5],TBtilde[6],TBtilde[7],TBtilde[8],TBtilde[9],TW[1],TW[2],TW[3],TW[4],TW[5],TW[6],TW[7],TW[8],TW[9])
 * 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 (49):
 * Single equations (assignments): 49
 * Array equations: 0
 * 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 0.0001121/0.4902, allocations: 135.6 kB / 0.586 GB, free: 33.73 MB / 462.3 MB
Notification: Performance of simCode: created initialization part: time 0.0009625/0.4912, allocations: 0.7988 MB / 0.5867 GB, free: 32.93 MB / 462.3 MB
Notification: Performance of simCode: created event and clocks part: time 1.923e-06/0.4912, allocations: 0 / 0.5867 GB, free: 32.93 MB / 462.3 MB
Notification: Performance of simCode: created simulation system equations: time 0.0003687/0.4915, allocations: 326.3 kB / 0.5871 GB, free: 32.61 MB / 462.3 MB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0003944/0.4919, allocations: 75.12 kB / 0.5871 GB, free: 32.54 MB / 462.3 MB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.002394/0.4943, allocations: 2.249 MB / 0.5893 GB, free: 30.27 MB / 462.3 MB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0001726/0.4945, allocations: 0.7956 MB / 0.5901 GB, free: 29.45 MB / 462.3 MB
Notification: Performance of simCode: alias equations: time 0.0003777/0.4949, allocations: 174.8 kB / 0.5903 GB, free: 29.27 MB / 462.3 MB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001605/0.4951, allocations: 31.44 kB / 0.5903 GB, free: 29.24 MB / 462.3 MB
Notification: Performance of SimCode: time 2e-07/0.4951, allocations: 0 / 0.5903 GB, free: 29.24 MB / 462.3 MB
Notification: Performance of Templates: time 0.006962/0.502, allocations: 5.405 MB / 0.5956 GB, free: 23.92 MB / 462.3 MB
make -j1 -f ScalableTestSuite_noopt_ScalableTestSuite.Thermal.HeatExchanger.ScaledExperiments.CocurrentHeatExchangerEquations_N_10.makefile
(rm -f ScalableTestSuite_noopt_ScalableTestSuite.Thermal.HeatExchanger.ScaledExperiments.CocurrentHeatExchangerEquations_N_10.pipe ; mkfifo ScalableTestSuite_noopt_ScalableTestSuite.Thermal.HeatExchanger.ScaledExperiments.CocurrentHeatExchangerEquations_N_10.pipe ; head -c 1048576 < ScalableTestSuite_noopt_ScalableTestSuite.Thermal.HeatExchanger.ScaledExperiments.CocurrentHeatExchangerEquations_N_10.pipe >> ../files/ScalableTestSuite_noopt_ScalableTestSuite.Thermal.HeatExchanger.ScaledExperiments.CocurrentHeatExchangerEquations_N_10.sim & ./ScalableTestSuite_noopt_ScalableTestSuite.Thermal.HeatExchanger.ScaledExperiments.CocurrentHeatExchangerEquations_N_10  -s=ida -abortSlowSimulation -alarm=300  -emit_protected -lv LOG_STATS > ScalableTestSuite_noopt_ScalableTestSuite.Thermal.HeatExchanger.ScaledExperiments.CocurrentHeatExchangerEquations_N_10.pipe 2>&1)
diffSimulationResults("ScalableTestSuite_noopt_ScalableTestSuite.Thermal.HeatExchanger.ScaledExperiments.CocurrentHeatExchangerEquations_N_10_res.mat","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/ReferenceFiles/ScalableTestSuite/ScalableTestSuite.Thermal.HeatExchanger.ScaledExperiments.CocurrentHeatExchangerEquations_N_10_res.mat","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/ScalableTestSuite_noopt_ScalableTestSuite.Thermal.HeatExchanger.ScaledExperiments.CocurrentHeatExchangerEquations_N_10.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001)
Reference file matches