Resizing raw images with PHP Imagick isn't working

Question

After multiple attempts, I was able to install ImageMagick and PHP Imagick extension. However, it fails to create Imagick object itself. Unfortunately, no error/ exception is shown anywhere.

My development environment is -

Apache/2.4.23 (Win64) PHP/7.0.10
CodeIgniter 3.0.3
imagick 3.4.3 (compiled with ImageMagick 6.9.3-7 Q16 x64 2016-03-27)
ImageMagick-7.0.8-61-Q16-x64-dll.exe

MAGICK_HOME and PATH variables are set correctly 

magick and convert commands on command line are working fine.

The output of below test is Yes

<?php
echo extension_loaded('imagick') && class_exists('Imagick') ? 'Yes' : 'No', PHP_EOL;

The output of below test is resulting in ERR_CONNECTION_RESET

try {
    $im = new Imagick('c:/IMG_2935.jpg'); OR

    $im = new Imagick('c:/IMG_2935.cr2'); OR

    $im = new Imagick();
    $im->readImage('C:/e35455e32c684bc70d187418d95b9eb7.CR2');


} catch (ImagickException $e) {
    print_r($e, true);
}

Pls help..

TIA