Forge/minecraft crashing on startup

I installed the 1.10.2 version of forge so I can play pixelmon but about half way through the download startup for minecraft, the game crashes. the following is the crash report

---- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!

Time: 2/3/18 4:53 PM
Description: Initializing game

SplashProgress has detected a error loading Minecraft.
This can sometimes be caused by bad video drivers.
We have automatically disabled the new Splash Screen in config/splash.properties.
Try reloading minecraft before reporting any errors.
net.minecraftforge.fml.client.SplashProgress$5: java.lang.IllegalStateException: Splash thread
    at net.minecraftforge.fml.client.SplashProgress.disableSplash(SplashProgress.java:594)
    at net.minecraftforge.fml.client.SplashProgress.finish(SplashProgress.java:586)
    at net.minecraftforge.fml.client.FMLClientHandler.haltGame(FMLClientHandler.java:316)
    at net.minecraftforge.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:345)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:520)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:351)
    at net.minecraft.client.main.Main.main(SourceFile:124)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.IllegalStateException: Splash thread
    at net.minecraftforge.fml.client.SplashProgress.checkThreadState(SplashProgress.java:519)
    at net.minecraftforge.fml.client.SplashProgress.finish(SplashProgress.java:574)
    ... 11 more
Caused by: java.lang.OutOfMemoryError: Java heap space
    at java.util.concurrent.CopyOnWriteArrayList.iterator(CopyOnWriteArrayList.java:1076)
    at net.minecraftforge.fml.common.ProgressManager.barIterator(ProgressManager.java:88)
    at net.minecraftforge.fml.client.SplashProgress$3.run(SplashProgress.java:262)
    at java.lang.Thread.run(Thread.java:745)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Client thread
Stacktrace:
    at net.minecraftforge.fml.client.SplashProgress.disableSplash(SplashProgress.java:594)
    at net.minecraftforge.fml.client.SplashProgress.finish(SplashProgress.java:586)
    at net.minecraftforge.fml.client.FMLClientHandler.haltGame(FMLClientHandler.java:316)
    at net.minecraftforge.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:345)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:520)

-- Initialization --
Details:
Stacktrace:
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:351)
    at net.minecraft.client.main.Main.main(SourceFile:124)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
    Minecraft Version: 1.10.2
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_25, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 51171560 bytes (48 MB) / 1073741824 bytes (1024 MB) up to 1073741824 bytes (1024 MB)
    JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP 9.32 Powered by Forge 12.18.3.2511 5 mods loaded, 5 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
    UCHI    mcp{9.19} [Minecraft Coder Pack] (minecraft.jar) 
    UCHI    FML{8.0.99.99} [Forge Mod Loader] (forge-1.10.2-12.18.3.2511.jar) 
    UCHI    Forge{12.18.3.2511} [Minecraft Forge] (forge-1.10.2-12.18.3.2511.jar) 
    UCHI    mercurius_updater{1.0} [mercurius_updater] (MercuriusUpdater-1.10.2.jar) 
    UCHE    pixelmon{5.0.3} [Pixelmon] (Pixelmon-1.10.2-5.0.3-universal.jar) 
    Loaded coremods (and transformers): 
    GL info: ' Vendor: 'NVIDIA Corporation' Version: '4.6.0 NVIDIA 388.13' Renderer: 'GeForce GTX 1080 Ti/PCIe/SSE2'
    Launched Version: 1.10.2-forge1.10.2-12.18.3.2511
    LWJGL: 2.9.4
    OpenGL: GeForce GTX 1080 Ti/PCIe/SSE2 GL version 4.6.0 NVIDIA 388.13, NVIDIA Corporation
    GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

    Using VBOs: Yes
    Is Modded: Definitely; Client brand changed to 'fml,forge'
    Type: Client (map_client.txt)
    Resource Packs: 
    Current Language: English (US)
    Profiler Position: N/A (disabled)
    CPU: 16x AMD Ryzen 7 1700 Eight-Core Processor